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Finding the Fourth Proportional to 185.67, 255.61 and 157.87

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Solution

The fourth proportional to 185.67, 255.61 and 157.87 is: 217.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.67 : 255.61 = 157.87 : x
  2. Step 2: Convert to fraction form
    185.67/255.61 = 157.87/x
  3. Step 3: Cross multiply
    185.67x = 255.61 × 157.87
  4. Step 4: Simplify right side
    185.67x = 40,353.50
  5. Step 5: Solve for x
    x = 40,353.50/185.67
  6. Step 6: Final answer
    x = 217.34

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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.