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Finding the Fourth Proportional to 657.90, 987 and 225.03

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Solution

The fourth proportional to 657.90, 987 and 225.03 is: 337.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.90 : 987 = 225.03 : x
  2. Step 2: Convert to fraction form
    657.90/987 = 225.03/x
  3. Step 3: Cross multiply
    657.90x = 987 × 225.03
  4. Step 4: Simplify right side
    657.90x = 222,104.61
  5. Step 5: Solve for x
    x = 222,104.61/657.90
  6. Step 6: Final answer
    x = 337.60

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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.