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Finding the Fourth Proportional to 57.15, 78.85 and 44.02

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Solution

The fourth proportional to 57.15, 78.85 and 44.02 is: 60.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.15 : 78.85 = 44.02 : x
  2. Step 2: Convert to fraction form
    57.15/78.85 = 44.02/x
  3. Step 3: Cross multiply
    57.15x = 78.85 × 44.02
  4. Step 4: Simplify right side
    57.15x = 3,470.98
  5. Step 5: Solve for x
    x = 3,470.98/57.15
  6. Step 6: Final answer
    x = 60.73

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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.