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Finding the Fourth Proportional to 63.22, 94.83 and 42.79

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Solution

The fourth proportional to 63.22, 94.83 and 42.79 is: 64.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.22 : 94.83 = 42.79 : x
  2. Step 2: Convert to fraction form
    63.22/94.83 = 42.79/x
  3. Step 3: Cross multiply
    63.22x = 94.83 × 42.79
  4. Step 4: Simplify right side
    63.22x = 4,057.30
  5. Step 5: Solve for x
    x = 4,057.30/63.22
  6. Step 6: Final answer
    x = 64.18

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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.