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Finding the Fourth Proportional to 61.15, 84.35 and 41.48

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Solution

The fourth proportional to 61.15, 84.35 and 41.48 is: 57.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.15 : 84.35 = 41.48 : x
  2. Step 2: Convert to fraction form
    61.15/84.35 = 41.48/x
  3. Step 3: Cross multiply
    61.15x = 84.35 × 41.48
  4. Step 4: Simplify right side
    61.15x = 3,498.84
  5. Step 5: Solve for x
    x = 3,498.84/61.15
  6. Step 6: Final answer
    x = 57.22

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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.