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Finding the Fourth Proportional to 837.17, 1,250.96 and 638.42

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Solution

The fourth proportional to 837.17, 1,250.96 and 638.42 is: 953.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.17 : 1,250.96 = 638.42 : x
  2. Step 2: Convert to fraction form
    837.17/1,250.96 = 638.42/x
  3. Step 3: Cross multiply
    837.17x = 1,250.96 × 638.42
  4. Step 4: Simplify right side
    837.17x = 798,642.61
  5. Step 5: Solve for x
    x = 798,642.61/837.17
  6. Step 6: Final answer
    x = 953.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.