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Finding the Fourth Proportional to 704,487.12, 972,192.12 and 402,687.60

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Solution

The fourth proportional to 704,487.12, 972,192.12 and 402,687.60 is: 555,708.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,487.12 : 972,192.12 = 402,687.60 : x
  2. Step 2: Convert to fraction form
    704,487.12/972,192.12 = 402,687.60/x
  3. Step 3: Cross multiply
    704,487.12x = 972,192.12 × 402,687.60
  4. Step 4: Simplify right side
    704,487.12x = 391,489,711,541.71
  5. Step 5: Solve for x
    x = 391,489,711,541.71/704,487.12
  6. Step 6: Final answer
    x = 555,708.83

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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.