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Finding the Fourth Proportional to 487.88, 731.90 and 231.38

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Solution

The fourth proportional to 487.88, 731.90 and 231.38 is: 347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.88 : 731.90 = 231.38 : x
  2. Step 2: Convert to fraction form
    487.88/731.90 = 231.38/x
  3. Step 3: Cross multiply
    487.88x = 731.90 × 231.38
  4. Step 4: Simplify right side
    487.88x = 169,343.94
  5. Step 5: Solve for x
    x = 169,343.94/487.88
  6. Step 6: Final answer
    x = 347.11

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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.