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Finding the Fourth Proportional to 59.80, 82.32 and 55.75

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Solution

The fourth proportional to 59.80, 82.32 and 55.75 is: 76.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.80 : 82.32 = 55.75 : x
  2. Step 2: Convert to fraction form
    59.80/82.32 = 55.75/x
  3. Step 3: Cross multiply
    59.80x = 82.32 × 55.75
  4. Step 4: Simplify right side
    59.80x = 4,589.34
  5. Step 5: Solve for x
    x = 4,589.34/59.80
  6. Step 6: Final answer
    x = 76.74

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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.