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Finding the Fourth Proportional to 61.28, 84.59 and 41.98

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Solution

The fourth proportional to 61.28, 84.59 and 41.98 is: 57.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.28 : 84.59 = 41.98 : x
  2. Step 2: Convert to fraction form
    61.28/84.59 = 41.98/x
  3. Step 3: Cross multiply
    61.28x = 84.59 × 41.98
  4. Step 4: Simplify right side
    61.28x = 3,550.98
  5. Step 5: Solve for x
    x = 3,550.98/61.28
  6. Step 6: Final answer
    x = 57.94

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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.