Four friends contributed money in the ratio 2:4:5:7.If the largest amount contributed was $1.40, calculate the total amount contributed by all four people?

If you multiply 7 by $0.2, you will get $1.40.

So for the first case, you also multiply 2 by $0.2 to get $0.40.
2:4:5:7 = $0.40: ? : ? : $1.40
You can take it from here?

The largest amount is $1.40, and the largest ratio is 7.

So
2:4:5:7 = ? : ? : ? :$1.40
Can you take it from here?

No

$7.20

try to perfect work

maths

To solve this problem, we need to find the value of the smallest ratio unit.

Let's assume the smallest ratio unit is x.

The ratio given is 2:4:5:7.

So, if the largest amount contributed is $1.40, it corresponds to the ratio unit 7x.

Now, we can set up a proportion to find the value of x:

7x / 1.40 = 1 / 1

To isolate x, we can cross-multiply:

7x = 1.40 * 1

7x = 1.40

Now, divide both sides of the equation by 7 to solve for x:

x = 1.40 / 7

x = 0.20

Therefore, the value of the smallest ratio unit (x) is $0.20.

To find the total amount contributed by all four people, we need to add up the amounts contributed by each person.

Person 1 contributed 2 units, so the total amount contributed by Person 1 is 2 * $0.20 = $0.40

Person 2 contributed 4 units, so the total amount contributed by Person 2 is 4 * $0.20 = $0.80

Person 3 contributed 5 units, so the total amount contributed by Person 3 is 5 * $0.20 = $1.00

Person 4 contributed 7 units, so the total amount contributed by Person 4 is 7 * $0.20 = $1.40

Now, to find the total amount contributed by all four people, we add up the amounts:

Total amount contributed = $0.40 + $0.80 + $1.00 + $1.40 = $3.60

Therefore, the total amount contributed by all four people is $3.60.