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Finding the Fourth Proportional to 546.80, 818.28 and 339.92

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Solution

The fourth proportional to 546.80, 818.28 and 339.92 is: 508.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.80 : 818.28 = 339.92 : x
  2. Step 2: Convert to fraction form
    546.80/818.28 = 339.92/x
  3. Step 3: Cross multiply
    546.80x = 818.28 × 339.92
  4. Step 4: Simplify right side
    546.80x = 278,149.74
  5. Step 5: Solve for x
    x = 278,149.74/546.80
  6. Step 6: Final answer
    x = 508.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.