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Finding the Fourth Proportional to 55.44, 83.04 and 39.15

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Solution

The fourth proportional to 55.44, 83.04 and 39.15 is: 58.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.44 : 83.04 = 39.15 : x
  2. Step 2: Convert to fraction form
    55.44/83.04 = 39.15/x
  3. Step 3: Cross multiply
    55.44x = 83.04 × 39.15
  4. Step 4: Simplify right side
    55.44x = 3,251.02
  5. Step 5: Solve for x
    x = 3,251.02/55.44
  6. Step 6: Final answer
    x = 58.64

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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.