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Finding the Fourth Proportional to 63.64, 86.68 and 63.44

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Solution

The fourth proportional to 63.64, 86.68 and 63.44 is: 86.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.64 : 86.68 = 63.44 : x
  2. Step 2: Convert to fraction form
    63.64/86.68 = 63.44/x
  3. Step 3: Cross multiply
    63.64x = 86.68 × 63.44
  4. Step 4: Simplify right side
    63.64x = 5,498.98
  5. Step 5: Solve for x
    x = 5,498.98/63.64
  6. Step 6: Final answer
    x = 86.41

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.