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Finding the Fourth Proportional to 57.06, 85.40 and 41.87

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Solution

The fourth proportional to 57.06, 85.40 and 41.87 is: 62.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.06 : 85.40 = 41.87 : x
  2. Step 2: Convert to fraction form
    57.06/85.40 = 41.87/x
  3. Step 3: Cross multiply
    57.06x = 85.40 × 41.87
  4. Step 4: Simplify right side
    57.06x = 3,575.70
  5. Step 5: Solve for x
    x = 3,575.70/57.06
  6. Step 6: Final answer
    x = 62.67

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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.