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Finding the Fourth Proportional to 57.44, 85.83 and 47.18

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Solution

The fourth proportional to 57.44, 85.83 and 47.18 is: 70.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.44 : 85.83 = 47.18 : x
  2. Step 2: Convert to fraction form
    57.44/85.83 = 47.18/x
  3. Step 3: Cross multiply
    57.44x = 85.83 × 47.18
  4. Step 4: Simplify right side
    57.44x = 4,049.22
  5. Step 5: Solve for x
    x = 4,049.22/57.44
  6. Step 6: Final answer
    x = 70.49

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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.