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Finding the Fourth Proportional to 62.78, 86.61 and 44.33

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Solution

The fourth proportional to 62.78, 86.61 and 44.33 is: 61.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.78 : 86.61 = 44.33 : x
  2. Step 2: Convert to fraction form
    62.78/86.61 = 44.33/x
  3. Step 3: Cross multiply
    62.78x = 86.61 × 44.33
  4. Step 4: Simplify right side
    62.78x = 3,839.42
  5. Step 5: Solve for x
    x = 3,839.42/62.78
  6. Step 6: Final answer
    x = 61.16

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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.