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Finding the Fourth Proportional to 709,807.85, 979,489.23 and 387,517.25

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Solution

The fourth proportional to 709,807.85, 979,489.23 and 387,517.25 is: 534,748.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,807.85 : 979,489.23 = 387,517.25 : x
  2. Step 2: Convert to fraction form
    709,807.85/979,489.23 = 387,517.25/x
  3. Step 3: Cross multiply
    709,807.85x = 979,489.23 × 387,517.25
  4. Step 4: Simplify right side
    709,807.85x = 379,568,975,262.94
  5. Step 5: Solve for x
    x = 379,568,975,262.94/709,807.85
  6. Step 6: Final answer
    x = 534,748.91

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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.