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Finding the Fourth Proportional to 42.46, 63.56 and 35.21

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Solution

The fourth proportional to 42.46, 63.56 and 35.21 is: 52.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.46 : 63.56 = 35.21 : x
  2. Step 2: Convert to fraction form
    42.46/63.56 = 35.21/x
  3. Step 3: Cross multiply
    42.46x = 63.56 × 35.21
  4. Step 4: Simplify right side
    42.46x = 2,237.95
  5. Step 5: Solve for x
    x = 2,237.95/42.46
  6. Step 6: Final answer
    x = 52.71

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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.