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Finding the Fourth Proportional to 185.18, 255.62 and 115.30

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Solution

The fourth proportional to 185.18, 255.62 and 115.30 is: 159.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.18 : 255.62 = 115.30 : x
  2. Step 2: Convert to fraction form
    185.18/255.62 = 115.30/x
  3. Step 3: Cross multiply
    185.18x = 255.62 × 115.30
  4. Step 4: Simplify right side
    185.18x = 29,472.99
  5. Step 5: Solve for x
    x = 29,472.99/185.18
  6. Step 6: Final answer
    x = 159.16

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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.