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Finding the Fourth Proportional to 718,403.67, 991,441.69 and 396,113.24

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Solution

The fourth proportional to 718,403.67, 991,441.69 and 396,113.24 is: 546,660.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,403.67 : 991,441.69 = 396,113.24 : x
  2. Step 2: Convert to fraction form
    718,403.67/991,441.69 = 396,113.24/x
  3. Step 3: Cross multiply
    718,403.67x = 991,441.69 × 396,113.24
  4. Step 4: Simplify right side
    718,403.67x = 392,723,181,585.30
  5. Step 5: Solve for x
    x = 392,723,181,585.30/718,403.67
  6. Step 6: Final answer
    x = 546,660.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.