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Finding the Fourth Proportional to 48.92, 73.27 and 39.80

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Solution

The fourth proportional to 48.92, 73.27 and 39.80 is: 59.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.92 : 73.27 = 39.80 : x
  2. Step 2: Convert to fraction form
    48.92/73.27 = 39.80/x
  3. Step 3: Cross multiply
    48.92x = 73.27 × 39.80
  4. Step 4: Simplify right side
    48.92x = 2,915.95
  5. Step 5: Solve for x
    x = 2,915.95/48.92
  6. Step 6: Final answer
    x = 59.61

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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.