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Finding the Fourth Proportional to 45.92, 63.39 and 39.77

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Solution

The fourth proportional to 45.92, 63.39 and 39.77 is: 54.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.92 : 63.39 = 39.77 : x
  2. Step 2: Convert to fraction form
    45.92/63.39 = 39.77/x
  3. Step 3: Cross multiply
    45.92x = 63.39 × 39.77
  4. Step 4: Simplify right side
    45.92x = 2,521.02
  5. Step 5: Solve for x
    x = 2,521.02/45.92
  6. Step 6: Final answer
    x = 54.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.