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Finding the Fourth Proportional to 57.31, 85.97 and 23.07

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Solution

The fourth proportional to 57.31, 85.97 and 23.07 is: 34.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.31 : 85.97 = 23.07 : x
  2. Step 2: Convert to fraction form
    57.31/85.97 = 23.07/x
  3. Step 3: Cross multiply
    57.31x = 85.97 × 23.07
  4. Step 4: Simplify right side
    57.31x = 1,983.35
  5. Step 5: Solve for x
    x = 1,983.35/57.31
  6. Step 6: Final answer
    x = 34.61

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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.