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Finding the Fourth Proportional to 487.46, 731.18 and 122.25

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Solution

The fourth proportional to 487.46, 731.18 and 122.25 is: 183.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.46 : 731.18 = 122.25 : x
  2. Step 2: Convert to fraction form
    487.46/731.18 = 122.25/x
  3. Step 3: Cross multiply
    487.46x = 731.18 × 122.25
  4. Step 4: Simplify right side
    487.46x = 89,382.49
  5. Step 5: Solve for x
    x = 89,382.49/487.46
  6. Step 6: Final answer
    x = 183.36

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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.