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Finding the Fourth Proportional to 56.97, 84.96 and 53.55

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Solution

The fourth proportional to 56.97, 84.96 and 53.55 is: 79.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.97 : 84.96 = 53.55 : x
  2. Step 2: Convert to fraction form
    56.97/84.96 = 53.55/x
  3. Step 3: Cross multiply
    56.97x = 84.96 × 53.55
  4. Step 4: Simplify right side
    56.97x = 4,549.61
  5. Step 5: Solve for x
    x = 4,549.61/56.97
  6. Step 6: Final answer
    x = 79.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.