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Finding the Fourth Proportional to 951.43, 1,312.93 and 531.78

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Solution

The fourth proportional to 951.43, 1,312.93 and 531.78 is: 733.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.43 : 1,312.93 = 531.78 : x
  2. Step 2: Convert to fraction form
    951.43/1,312.93 = 531.78/x
  3. Step 3: Cross multiply
    951.43x = 1,312.93 × 531.78
  4. Step 4: Simplify right side
    951.43x = 698,189.92
  5. Step 5: Solve for x
    x = 698,189.92/951.43
  6. Step 6: Final answer
    x = 733.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.