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Finding the Fourth Proportional to 56.27, 84.24 and 39.89

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Solution

The fourth proportional to 56.27, 84.24 and 39.89 is: 59.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.27 : 84.24 = 39.89 : x
  2. Step 2: Convert to fraction form
    56.27/84.24 = 39.89/x
  3. Step 3: Cross multiply
    56.27x = 84.24 × 39.89
  4. Step 4: Simplify right side
    56.27x = 3,360.54
  5. Step 5: Solve for x
    x = 3,360.54/56.27
  6. Step 6: Final answer
    x = 59.72

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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.