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Finding the Fourth Proportional to 56.91, 84.87 and 53.52

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Solution

The fourth proportional to 56.91, 84.87 and 53.52 is: 79.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.91 : 84.87 = 53.52 : x
  2. Step 2: Convert to fraction form
    56.91/84.87 = 53.52/x
  3. Step 3: Cross multiply
    56.91x = 84.87 × 53.52
  4. Step 4: Simplify right side
    56.91x = 4,542.24
  5. Step 5: Solve for x
    x = 4,542.24/56.91
  6. Step 6: Final answer
    x = 79.81

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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.