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Finding the Fourth Proportional to 52.78, 79.17 and 44.80

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Solution

The fourth proportional to 52.78, 79.17 and 44.80 is: 67.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.78 : 79.17 = 44.80 : x
  2. Step 2: Convert to fraction form
    52.78/79.17 = 44.80/x
  3. Step 3: Cross multiply
    52.78x = 79.17 × 44.80
  4. Step 4: Simplify right side
    52.78x = 3,546.82
  5. Step 5: Solve for x
    x = 3,546.82/52.78
  6. Step 6: Final answer
    x = 67.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.