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Finding the Fourth Proportional to 546.15, 753.42 and 398.73

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Solution

The fourth proportional to 546.15, 753.42 and 398.73 is: 550.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.15 : 753.42 = 398.73 : x
  2. Step 2: Convert to fraction form
    546.15/753.42 = 398.73/x
  3. Step 3: Cross multiply
    546.15x = 753.42 × 398.73
  4. Step 4: Simplify right side
    546.15x = 300,411.16
  5. Step 5: Solve for x
    x = 300,411.16/546.15
  6. Step 6: Final answer
    x = 550.05

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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.