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Finding the Fourth Proportional to 391.88, 540.36 and 333.56

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Solution

The fourth proportional to 391.88, 540.36 and 333.56 is: 459.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.88 : 540.36 = 333.56 : x
  2. Step 2: Convert to fraction form
    391.88/540.36 = 333.56/x
  3. Step 3: Cross multiply
    391.88x = 540.36 × 333.56
  4. Step 4: Simplify right side
    391.88x = 180,242.48
  5. Step 5: Solve for x
    x = 180,242.48/391.88
  6. Step 6: Final answer
    x = 459.94

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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.