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Finding the Fourth Proportional to 387,387.07, 580,747.80 and 134,634.72

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Solution

The fourth proportional to 387,387.07, 580,747.80 and 134,634.72 is: 201,836.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,387.07 : 580,747.80 = 134,634.72 : x
  2. Step 2: Convert to fraction form
    387,387.07/580,747.80 = 134,634.72/x
  3. Step 3: Cross multiply
    387,387.07x = 580,747.80 × 134,634.72
  4. Step 4: Simplify right side
    387,387.07x = 78,188,820,126.30
  5. Step 5: Solve for x
    x = 78,188,820,126.30/387,387.07
  6. Step 6: Final answer
    x = 201,836.42

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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.