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Finding the Fourth Proportional to 709,907.92, 979,693.10 and 387,638.44

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Solution

The fourth proportional to 709,907.92, 979,693.10 and 387,638.44 is: 534,952.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,907.92 : 979,693.10 = 387,638.44 : x
  2. Step 2: Convert to fraction form
    709,907.92/979,693.10 = 387,638.44/x
  3. Step 3: Cross multiply
    709,907.92x = 979,693.10 × 387,638.44
  4. Step 4: Simplify right side
    709,907.92x = 379,766,704,962.76
  5. Step 5: Solve for x
    x = 379,766,704,962.76/709,907.92
  6. Step 6: Final answer
    x = 534,952.06

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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.