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Finding the Fourth Proportional to 391.14, 539.37 and 336.06

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Solution

The fourth proportional to 391.14, 539.37 and 336.06 is: 463.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.14 : 539.37 = 336.06 : x
  2. Step 2: Convert to fraction form
    391.14/539.37 = 336.06/x
  3. Step 3: Cross multiply
    391.14x = 539.37 × 336.06
  4. Step 4: Simplify right side
    391.14x = 181,260.68
  5. Step 5: Solve for x
    x = 181,260.68/391.14
  6. Step 6: Final answer
    x = 463.42

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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.