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Finding the Fourth Proportional to 42.65, 63.67 and 42.22

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Solution

The fourth proportional to 42.65, 63.67 and 42.22 is: 63.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.65 : 63.67 = 42.22 : x
  2. Step 2: Convert to fraction form
    42.65/63.67 = 42.22/x
  3. Step 3: Cross multiply
    42.65x = 63.67 × 42.22
  4. Step 4: Simplify right side
    42.65x = 2,687.94
  5. Step 5: Solve for x
    x = 2,687.94/42.65
  6. Step 6: Final answer
    x = 63.02

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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.