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Finding the Fourth Proportional to 51.57, 71.20 and 44.75

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Solution

The fourth proportional to 51.57, 71.20 and 44.75 is: 61.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.57 : 71.20 = 44.75 : x
  2. Step 2: Convert to fraction form
    51.57/71.20 = 44.75/x
  3. Step 3: Cross multiply
    51.57x = 71.20 × 44.75
  4. Step 4: Simplify right side
    51.57x = 3,186.20
  5. Step 5: Solve for x
    x = 3,186.20/51.57
  6. Step 6: Final answer
    x = 61.78

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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.