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Finding the Fourth Proportional to 56.88, 84.75 and 53.39

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Solution

The fourth proportional to 56.88, 84.75 and 53.39 is: 79.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.88 : 84.75 = 53.39 : x
  2. Step 2: Convert to fraction form
    56.88/84.75 = 53.39/x
  3. Step 3: Cross multiply
    56.88x = 84.75 × 53.39
  4. Step 4: Simplify right side
    56.88x = 4,524.38
  5. Step 5: Solve for x
    x = 4,524.38/56.88
  6. Step 6: Final answer
    x = 79.54

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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.