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Finding the Fourth Proportional to 658.31, 987.47 and 171.37

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Solution

The fourth proportional to 658.31, 987.47 and 171.37 is: 257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.31 : 987.47 = 171.37 : x
  2. Step 2: Convert to fraction form
    658.31/987.47 = 171.37/x
  3. Step 3: Cross multiply
    658.31x = 987.47 × 171.37
  4. Step 4: Simplify right side
    658.31x = 169,219.16
  5. Step 5: Solve for x
    x = 169,219.16/658.31
  6. Step 6: Final answer
    x = 257.05

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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.