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Finding the Fourth Proportional to 387,191.52, 580,809.12 and 137,873.52

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Solution

The fourth proportional to 387,191.52, 580,809.12 and 137,873.52 is: 206,818.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,191.52 : 580,809.12 = 137,873.52 : x
  2. Step 2: Convert to fraction form
    387,191.52/580,809.12 = 137,873.52/x
  3. Step 3: Cross multiply
    387,191.52x = 580,809.12 × 137,873.52
  4. Step 4: Simplify right side
    387,191.52x = 80,078,197,822.50
  5. Step 5: Solve for x
    x = 80,078,197,822.50/387,191.52
  6. Step 6: Final answer
    x = 206,818.06

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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.