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Finding the Fourth Proportional to 55.32, 82.42 and 52.74

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Solution

The fourth proportional to 55.32, 82.42 and 52.74 is: 78.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.32 : 82.42 = 52.74 : x
  2. Step 2: Convert to fraction form
    55.32/82.42 = 52.74/x
  3. Step 3: Cross multiply
    55.32x = 82.42 × 52.74
  4. Step 4: Simplify right side
    55.32x = 4,346.83
  5. Step 5: Solve for x
    x = 4,346.83/55.32
  6. Step 6: Final answer
    x = 78.58

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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.