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Finding the Fourth Proportional to 44.55, 61.47 and 28.20

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Solution

The fourth proportional to 44.55, 61.47 and 28.20 is: 38.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.55 : 61.47 = 28.20 : x
  2. Step 2: Convert to fraction form
    44.55/61.47 = 28.20/x
  3. Step 3: Cross multiply
    44.55x = 61.47 × 28.20
  4. Step 4: Simplify right side
    44.55x = 1,733.45
  5. Step 5: Solve for x
    x = 1,733.45/44.55
  6. Step 6: Final answer
    x = 38.91

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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.