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Finding the Fourth Proportional to 56.88, 84.66 and 54.96

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Solution

The fourth proportional to 56.88, 84.66 and 54.96 is: 81.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.88 : 84.66 = 54.96 : x
  2. Step 2: Convert to fraction form
    56.88/84.66 = 54.96/x
  3. Step 3: Cross multiply
    56.88x = 84.66 × 54.96
  4. Step 4: Simplify right side
    56.88x = 4,652.91
  5. Step 5: Solve for x
    x = 4,652.91/56.88
  6. Step 6: Final answer
    x = 81.80

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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.