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Finding the Fourth Proportional to 62.91, 94.26 and 57.21

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Solution

The fourth proportional to 62.91, 94.26 and 57.21 is: 85.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.91 : 94.26 = 57.21 : x
  2. Step 2: Convert to fraction form
    62.91/94.26 = 57.21/x
  3. Step 3: Cross multiply
    62.91x = 94.26 × 57.21
  4. Step 4: Simplify right side
    62.91x = 5,392.61
  5. Step 5: Solve for x
    x = 5,392.61/62.91
  6. Step 6: Final answer
    x = 85.72

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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.