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Finding the Fourth Proportional to 546.12, 753.60 and 428.20

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Solution

The fourth proportional to 546.12, 753.60 and 428.20 is: 590.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.12 : 753.60 = 428.20 : x
  2. Step 2: Convert to fraction form
    546.12/753.60 = 428.20/x
  3. Step 3: Cross multiply
    546.12x = 753.60 × 428.20
  4. Step 4: Simplify right side
    546.12x = 322,691.52
  5. Step 5: Solve for x
    x = 322,691.52/546.12
  6. Step 6: Final answer
    x = 590.88

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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.