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Finding the Fourth Proportional to 57.87, 79.85 and 33.31

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Solution

The fourth proportional to 57.87, 79.85 and 33.31 is: 45.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.87 : 79.85 = 33.31 : x
  2. Step 2: Convert to fraction form
    57.87/79.85 = 33.31/x
  3. Step 3: Cross multiply
    57.87x = 79.85 × 33.31
  4. Step 4: Simplify right side
    57.87x = 2,659.24
  5. Step 5: Solve for x
    x = 2,659.24/57.87
  6. Step 6: Final answer
    x = 45.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.