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Finding the Fourth Proportional to 709,944.28, 979,726.71 and 387,654.38

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Solution

The fourth proportional to 709,944.28, 979,726.71 and 387,654.38 is: 534,965.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,944.28 : 979,726.71 = 387,654.38 : x
  2. Step 2: Convert to fraction form
    709,944.28/979,726.71 = 387,654.38/x
  3. Step 3: Cross multiply
    709,944.28x = 979,726.71 × 387,654.38
  4. Step 4: Simplify right side
    709,944.28x = 379,795,347,629.69
  5. Step 5: Solve for x
    x = 379,795,347,629.69/709,944.28
  6. Step 6: Final answer
    x = 534,965.01

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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.