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Finding the Fourth Proportional to 709,438.80, 979,046.34 and 387,169.62

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Solution

The fourth proportional to 709,438.80, 979,046.34 and 387,169.62 is: 534,305.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,438.80 : 979,046.34 = 387,169.62 : x
  2. Step 2: Convert to fraction form
    709,438.80/979,046.34 = 387,169.62/x
  3. Step 3: Cross multiply
    709,438.80x = 979,046.34 × 387,169.62
  4. Step 4: Simplify right side
    709,438.80x = 379,057,000,388.12
  5. Step 5: Solve for x
    x = 379,057,000,388.12/709,438.80
  6. Step 6: Final answer
    x = 534,305.42

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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.