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Finding the Fourth Proportional to 709,355.47, 978,934.17 and 387,083.25

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Solution

The fourth proportional to 709,355.47, 978,934.17 and 387,083.25 is: 534,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,355.47 : 978,934.17 = 387,083.25 : x
  2. Step 2: Convert to fraction form
    709,355.47/978,934.17 = 387,083.25/x
  3. Step 3: Cross multiply
    709,355.47x = 978,934.17 × 387,083.25
  4. Step 4: Simplify right side
    709,355.47x = 378,929,020,059.65
  5. Step 5: Solve for x
    x = 378,929,020,059.65/709,355.47
  6. Step 6: Final answer
    x = 534,187.77

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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.