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Finding the Fourth Proportional to 951.17, 1,427.22 and 642.34

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Solution

The fourth proportional to 951.17, 1,427.22 and 642.34 is: 963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.17 : 1,427.22 = 642.34 : x
  2. Step 2: Convert to fraction form
    951.17/1,427.22 = 642.34/x
  3. Step 3: Cross multiply
    951.17x = 1,427.22 × 642.34
  4. Step 4: Simplify right side
    951.17x = 916,763.48
  5. Step 5: Solve for x
    x = 916,763.48/951.17
  6. Step 6: Final answer
    x = 963.83

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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.