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Finding the Fourth Proportional to 269.42, 371.63 and 243.15

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Solution

The fourth proportional to 269.42, 371.63 and 243.15 is: 335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.42 : 371.63 = 243.15 : x
  2. Step 2: Convert to fraction form
    269.42/371.63 = 243.15/x
  3. Step 3: Cross multiply
    269.42x = 371.63 × 243.15
  4. Step 4: Simplify right side
    269.42x = 90,360.62
  5. Step 5: Solve for x
    x = 90,360.62/269.42
  6. Step 6: Final answer
    x = 335.40

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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.