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Finding the Fourth Proportional to 487.65, 731.28 and 179.43

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Solution

The fourth proportional to 487.65, 731.28 and 179.43 is: 269.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.65 : 731.28 = 179.43 : x
  2. Step 2: Convert to fraction form
    487.65/731.28 = 179.43/x
  3. Step 3: Cross multiply
    487.65x = 731.28 × 179.43
  4. Step 4: Simplify right side
    487.65x = 131,213.57
  5. Step 5: Solve for x
    x = 131,213.57/487.65
  6. Step 6: Final answer
    x = 269.07

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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.