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Finding the Fourth Proportional to 392.27, 586.15 and 269.55

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Solution

The fourth proportional to 392.27, 586.15 and 269.55 is: 402.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.27 : 586.15 = 269.55 : x
  2. Step 2: Convert to fraction form
    392.27/586.15 = 269.55/x
  3. Step 3: Cross multiply
    392.27x = 586.15 × 269.55
  4. Step 4: Simplify right side
    392.27x = 157,996.06
  5. Step 5: Solve for x
    x = 157,996.06/392.27
  6. Step 6: Final answer
    x = 402.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.