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Finding the Fourth Proportional to 56.91, 85.32 and 26.49

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Solution

The fourth proportional to 56.91, 85.32 and 26.49 is: 39.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.91 : 85.32 = 26.49 : x
  2. Step 2: Convert to fraction form
    56.91/85.32 = 26.49/x
  3. Step 3: Cross multiply
    56.91x = 85.32 × 26.49
  4. Step 4: Simplify right side
    56.91x = 2,260.13
  5. Step 5: Solve for x
    x = 2,260.13/56.91
  6. Step 6: Final answer
    x = 39.71

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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.