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Finding the Fourth Proportional to 487.28, 730.82 and 179.13

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Solution

The fourth proportional to 487.28, 730.82 and 179.13 is: 268.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.28 : 730.82 = 179.13 : x
  2. Step 2: Convert to fraction form
    487.28/730.82 = 179.13/x
  3. Step 3: Cross multiply
    487.28x = 730.82 × 179.13
  4. Step 4: Simplify right side
    487.28x = 130,910.86
  5. Step 5: Solve for x
    x = 130,910.86/487.28
  6. Step 6: Final answer
    x = 268.65

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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.