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Finding the Fourth Proportional to 387,375.40, 581,063.10 and 137,967.40

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Solution

The fourth proportional to 387,375.40, 581,063.10 and 137,967.40 is: 206,951.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,375.40 : 581,063.10 = 137,967.40 : x
  2. Step 2: Convert to fraction form
    387,375.40/581,063.10 = 137,967.40/x
  3. Step 3: Cross multiply
    387,375.40x = 581,063.10 × 137,967.40
  4. Step 4: Simplify right side
    387,375.40x = 80,167,765,142.94
  5. Step 5: Solve for x
    x = 80,167,765,142.94/387,375.40
  6. Step 6: Final answer
    x = 206,951.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.