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Finding the Fourth Proportional to 42.26, 63.59 and 34.70

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Solution

The fourth proportional to 42.26, 63.59 and 34.70 is: 52.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.26 : 63.59 = 34.70 : x
  2. Step 2: Convert to fraction form
    42.26/63.59 = 34.70/x
  3. Step 3: Cross multiply
    42.26x = 63.59 × 34.70
  4. Step 4: Simplify right side
    42.26x = 2,206.08
  5. Step 5: Solve for x
    x = 2,206.08/42.26
  6. Step 6: Final answer
    x = 52.21

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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.