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Finding the Fourth Proportional to 269.43, 371.81 and 151.40

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Solution

The fourth proportional to 269.43, 371.81 and 151.40 is: 208.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.43 : 371.81 = 151.40 : x
  2. Step 2: Convert to fraction form
    269.43/371.81 = 151.40/x
  3. Step 3: Cross multiply
    269.43x = 371.81 × 151.40
  4. Step 4: Simplify right side
    269.43x = 56,289.42
  5. Step 5: Solve for x
    x = 56,289.42/269.43
  6. Step 6: Final answer
    x = 208.92

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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.