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Finding the Fourth Proportional to 542.57, 813.44 and 268.79

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Solution

The fourth proportional to 542.57, 813.44 and 268.79 is: 402.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.57 : 813.44 = 268.79 : x
  2. Step 2: Convert to fraction form
    542.57/813.44 = 268.79/x
  3. Step 3: Cross multiply
    542.57x = 813.44 × 268.79
  4. Step 4: Simplify right side
    542.57x = 218,641.14
  5. Step 5: Solve for x
    x = 218,641.14/542.57
  6. Step 6: Final answer
    x = 402.98

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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.