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Finding the Fourth Proportional to 61.28, 84.50 and 44.90

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Solution

The fourth proportional to 61.28, 84.50 and 44.90 is: 61.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.28 : 84.50 = 44.90 : x
  2. Step 2: Convert to fraction form
    61.28/84.50 = 44.90/x
  3. Step 3: Cross multiply
    61.28x = 84.50 × 44.90
  4. Step 4: Simplify right side
    61.28x = 3,794.05
  5. Step 5: Solve for x
    x = 3,794.05/61.28
  6. Step 6: Final answer
    x = 61.91

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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.