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Finding the Fourth Proportional to 487.55, 731.36 and 282.15

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Solution

The fourth proportional to 487.55, 731.36 and 282.15 is: 423.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.55 : 731.36 = 282.15 : x
  2. Step 2: Convert to fraction form
    487.55/731.36 = 282.15/x
  3. Step 3: Cross multiply
    487.55x = 731.36 × 282.15
  4. Step 4: Simplify right side
    487.55x = 206,353.93
  5. Step 5: Solve for x
    x = 206,353.93/487.55
  6. Step 6: Final answer
    x = 423.24

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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.