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Finding the Fourth Proportional to 391.38, 539.96 and 273.36

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Solution

The fourth proportional to 391.38, 539.96 and 273.36 is: 377.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.38 : 539.96 = 273.36 : x
  2. Step 2: Convert to fraction form
    391.38/539.96 = 273.36/x
  3. Step 3: Cross multiply
    391.38x = 539.96 × 273.36
  4. Step 4: Simplify right side
    391.38x = 147,602.10
  5. Step 5: Solve for x
    x = 147,602.10/391.38
  6. Step 6: Final answer
    x = 377.13

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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.