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Finding the Fourth Proportional to 657.62, 987.54 and 631.46

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Solution

The fourth proportional to 657.62, 987.54 and 631.46 is: 948.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.62 : 987.54 = 631.46 : x
  2. Step 2: Convert to fraction form
    657.62/987.54 = 631.46/x
  3. Step 3: Cross multiply
    657.62x = 987.54 × 631.46
  4. Step 4: Simplify right side
    657.62x = 623,592.01
  5. Step 5: Solve for x
    x = 623,592.01/657.62
  6. Step 6: Final answer
    x = 948.26

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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.