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Finding the Fourth Proportional to 63.26, 94.53 and 42.80

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Solution

The fourth proportional to 63.26, 94.53 and 42.80 is: 63.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.26 : 94.53 = 42.80 : x
  2. Step 2: Convert to fraction form
    63.26/94.53 = 42.80/x
  3. Step 3: Cross multiply
    63.26x = 94.53 × 42.80
  4. Step 4: Simplify right side
    63.26x = 4,045.88
  5. Step 5: Solve for x
    x = 4,045.88/63.26
  6. Step 6: Final answer
    x = 63.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.