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Finding the Fourth Proportional to 951.55, 1,312.99 and 531.86

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Solution

The fourth proportional to 951.55, 1,312.99 and 531.86 is: 733.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.55 : 1,312.99 = 531.86 : x
  2. Step 2: Convert to fraction form
    951.55/1,312.99 = 531.86/x
  3. Step 3: Cross multiply
    951.55x = 1,312.99 × 531.86
  4. Step 4: Simplify right side
    951.55x = 698,321.96
  5. Step 5: Solve for x
    x = 698,321.96/951.55
  6. Step 6: Final answer
    x = 733.88

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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.