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Finding the Fourth Proportional to 288,591.80, 432,327.20 and 138,937.20

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Solution

The fourth proportional to 288,591.80, 432,327.20 and 138,937.20 is: 208,135.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,591.80 : 432,327.20 = 138,937.20 : x
  2. Step 2: Convert to fraction form
    288,591.80/432,327.20 = 138,937.20/x
  3. Step 3: Cross multiply
    288,591.80x = 432,327.20 × 138,937.20
  4. Step 4: Simplify right side
    288,591.80x = 60,066,329,957.15
  5. Step 5: Solve for x
    x = 60,066,329,957.15/288,591.80
  6. Step 6: Final answer
    x = 208,135.96

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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.