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Finding the Fourth Proportional to 45.50, 62.80 and 38.92

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Solution

The fourth proportional to 45.50, 62.80 and 38.92 is: 53.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.50 : 62.80 = 38.92 : x
  2. Step 2: Convert to fraction form
    45.50/62.80 = 38.92/x
  3. Step 3: Cross multiply
    45.50x = 62.80 × 38.92
  4. Step 4: Simplify right side
    45.50x = 2,444.18
  5. Step 5: Solve for x
    x = 2,444.18/45.50
  6. Step 6: Final answer
    x = 53.72

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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.