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Finding the Fourth Proportional to 546.38, 819.28 and 285.75

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Solution

The fourth proportional to 546.38, 819.28 and 285.75 is: 428.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.38 : 819.28 = 285.75 : x
  2. Step 2: Convert to fraction form
    546.38/819.28 = 285.75/x
  3. Step 3: Cross multiply
    546.38x = 819.28 × 285.75
  4. Step 4: Simplify right side
    546.38x = 234,109.26
  5. Step 5: Solve for x
    x = 234,109.26/546.38
  6. Step 6: Final answer
    x = 428.47

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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.