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Finding the Fourth Proportional to 316.11, 435.90 and 249.61

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Solution

The fourth proportional to 316.11, 435.90 and 249.61 is: 344.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.11 : 435.90 = 249.61 : x
  2. Step 2: Convert to fraction form
    316.11/435.90 = 249.61/x
  3. Step 3: Cross multiply
    316.11x = 435.90 × 249.61
  4. Step 4: Simplify right side
    316.11x = 108,801.57
  5. Step 5: Solve for x
    x = 108,801.57/316.11
  6. Step 6: Final answer
    x = 344.19

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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.