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Finding the Fourth Proportional to 951.78, 1,427.07 and 534.65

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Solution

The fourth proportional to 951.78, 1,427.07 and 534.65 is: 801.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.78 : 1,427.07 = 534.65 : x
  2. Step 2: Convert to fraction form
    951.78/1,427.07 = 534.65/x
  3. Step 3: Cross multiply
    951.78x = 1,427.07 × 534.65
  4. Step 4: Simplify right side
    951.78x = 762,982.98
  5. Step 5: Solve for x
    x = 762,982.98/951.78
  6. Step 6: Final answer
    x = 801.64

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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.