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Finding the Fourth Proportional to 44.64, 61.58 and 39.80

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Solution

The fourth proportional to 44.64, 61.58 and 39.80 is: 54.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.64 : 61.58 = 39.80 : x
  2. Step 2: Convert to fraction form
    44.64/61.58 = 39.80/x
  3. Step 3: Cross multiply
    44.64x = 61.58 × 39.80
  4. Step 4: Simplify right side
    44.64x = 2,450.88
  5. Step 5: Solve for x
    x = 2,450.88/44.64
  6. Step 6: Final answer
    x = 54.90

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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.