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Finding the Fourth Proportional to 542.87, 748.78 and 333.15

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Solution

The fourth proportional to 542.87, 748.78 and 333.15 is: 459.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.87 : 748.78 = 333.15 : x
  2. Step 2: Convert to fraction form
    542.87/748.78 = 333.15/x
  3. Step 3: Cross multiply
    542.87x = 748.78 × 333.15
  4. Step 4: Simplify right side
    542.87x = 249,456.89
  5. Step 5: Solve for x
    x = 249,456.89/542.87
  6. Step 6: Final answer
    x = 459.51

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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.