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Finding the Fourth Proportional to 487.47, 731.41 and 243.87

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Solution

The fourth proportional to 487.47, 731.41 and 243.87 is: 365.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.47 : 731.41 = 243.87 : x
  2. Step 2: Convert to fraction form
    487.47/731.41 = 243.87/x
  3. Step 3: Cross multiply
    487.47x = 731.41 × 243.87
  4. Step 4: Simplify right side
    487.47x = 178,368.96
  5. Step 5: Solve for x
    x = 178,368.96/487.47
  6. Step 6: Final answer
    x = 365.91

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.