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Finding the Fourth Proportional to 269.85, 372.18 and 187.09

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Solution

The fourth proportional to 269.85, 372.18 and 187.09 is: 258.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.85 : 372.18 = 187.09 : x
  2. Step 2: Convert to fraction form
    269.85/372.18 = 187.09/x
  3. Step 3: Cross multiply
    269.85x = 372.18 × 187.09
  4. Step 4: Simplify right side
    269.85x = 69,631.16
  5. Step 5: Solve for x
    x = 69,631.16/269.85
  6. Step 6: Final answer
    x = 258.04

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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.