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Finding the Fourth Proportional to 391.59, 539.33 and 293.18

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Solution

The fourth proportional to 391.59, 539.33 and 293.18 is: 403.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.59 : 539.33 = 293.18 : x
  2. Step 2: Convert to fraction form
    391.59/539.33 = 293.18/x
  3. Step 3: Cross multiply
    391.59x = 539.33 × 293.18
  4. Step 4: Simplify right side
    391.59x = 158,116.61
  5. Step 5: Solve for x
    x = 158,116.61/391.59
  6. Step 6: Final answer
    x = 403.78

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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.