Home / 990,007.20-1,485,010.80-712,144.80

Finding the Fourth Proportional to 990,007.20, 1,485,010.80 and 712,144.80

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Solution

The fourth proportional to 990,007.20, 1,485,010.80 and 712,144.80 is: 1,068,217.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,007.20 : 1,485,010.80 = 712,144.80 : x
  2. Step 2: Convert to fraction form
    990,007.20/1,485,010.80 = 712,144.80/x
  3. Step 3: Cross multiply
    990,007.20x = 1,485,010.80 × 712,144.80
  4. Step 4: Simplify right side
    990,007.20x = 1,057,542,719,163.84
  5. Step 5: Solve for x
    x = 1,057,542,719,163.84/990,007.20
  6. Step 6: Final answer
    x = 1,068,217.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.