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Finding the Fourth Proportional to 56.44, 83.92 and 55.90

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Solution

The fourth proportional to 56.44, 83.92 and 55.90 is: 83.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.44 : 83.92 = 55.90 : x
  2. Step 2: Convert to fraction form
    56.44/83.92 = 55.90/x
  3. Step 3: Cross multiply
    56.44x = 83.92 × 55.90
  4. Step 4: Simplify right side
    56.44x = 4,691.13
  5. Step 5: Solve for x
    x = 4,691.13/56.44
  6. Step 6: Final answer
    x = 83.12

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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.