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Finding the Fourth Proportional to 63.29, 86.85 and 57.85

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Solution

The fourth proportional to 63.29, 86.85 and 57.85 is: 79.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.29 : 86.85 = 57.85 : x
  2. Step 2: Convert to fraction form
    63.29/86.85 = 57.85/x
  3. Step 3: Cross multiply
    63.29x = 86.85 × 57.85
  4. Step 4: Simplify right side
    63.29x = 5,024.27
  5. Step 5: Solve for x
    x = 5,024.27/63.29
  6. Step 6: Final answer
    x = 79.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.