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Finding the Fourth Proportional to 717,932.70, 990,753.91 and 395,654.56

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Solution

The fourth proportional to 717,932.70, 990,753.91 and 395,654.56 is: 546,007.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,932.70 : 990,753.91 = 395,654.56 : x
  2. Step 2: Convert to fraction form
    717,932.70/990,753.91 = 395,654.56/x
  3. Step 3: Cross multiply
    717,932.70x = 990,753.91 × 395,654.56
  4. Step 4: Simplify right side
    717,932.70x = 391,996,298,863.31
  5. Step 5: Solve for x
    x = 391,996,298,863.31/717,932.70
  6. Step 6: Final answer
    x = 546,007.03

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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.