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Finding the Fourth Proportional to 44.48, 61.38 and 28.12

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Solution

The fourth proportional to 44.48, 61.38 and 28.12 is: 38.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.48 : 61.38 = 28.12 : x
  2. Step 2: Convert to fraction form
    44.48/61.38 = 28.12/x
  3. Step 3: Cross multiply
    44.48x = 61.38 × 28.12
  4. Step 4: Simplify right side
    44.48x = 1,726.01
  5. Step 5: Solve for x
    x = 1,726.01/44.48
  6. Step 6: Final answer
    x = 38.80

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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.