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Finding the Fourth Proportional to 63.95, 87.66 and 62.40

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Solution

The fourth proportional to 63.95, 87.66 and 62.40 is: 85.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.95 : 87.66 = 62.40 : x
  2. Step 2: Convert to fraction form
    63.95/87.66 = 62.40/x
  3. Step 3: Cross multiply
    63.95x = 87.66 × 62.40
  4. Step 4: Simplify right side
    63.95x = 5,469.98
  5. Step 5: Solve for x
    x = 5,469.98/63.95
  6. Step 6: Final answer
    x = 85.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.