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Finding the Fourth Proportional to 542.72, 813.50 and 268.26

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Solution

The fourth proportional to 542.72, 813.50 and 268.26 is: 402.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.72 : 813.50 = 268.26 : x
  2. Step 2: Convert to fraction form
    542.72/813.50 = 268.26/x
  3. Step 3: Cross multiply
    542.72x = 813.50 × 268.26
  4. Step 4: Simplify right side
    542.72x = 218,229.51
  5. Step 5: Solve for x
    x = 218,229.51/542.72
  6. Step 6: Final answer
    x = 402.10

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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.