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Finding the Fourth Proportional to 44.78, 61.77 and 28.38

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Solution

The fourth proportional to 44.78, 61.77 and 28.38 is: 39.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.78 : 61.77 = 28.38 : x
  2. Step 2: Convert to fraction form
    44.78/61.77 = 28.38/x
  3. Step 3: Cross multiply
    44.78x = 61.77 × 28.38
  4. Step 4: Simplify right side
    44.78x = 1,753.03
  5. Step 5: Solve for x
    x = 1,753.03/44.78
  6. Step 6: Final answer
    x = 39.15

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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.