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Finding the Fourth Proportional to 487.60, 731.47 and 179.43

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Solution

The fourth proportional to 487.60, 731.47 and 179.43 is: 269.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.60 : 731.47 = 179.43 : x
  2. Step 2: Convert to fraction form
    487.60/731.47 = 179.43/x
  3. Step 3: Cross multiply
    487.60x = 731.47 × 179.43
  4. Step 4: Simplify right side
    487.60x = 131,243.56
  5. Step 5: Solve for x
    x = 131,243.56/487.60
  6. Step 6: Final answer
    x = 269.16

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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.