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Finding the Fourth Proportional to 542.34, 813.59 and 268.45

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Solution

The fourth proportional to 542.34, 813.59 and 268.45 is: 402.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.34 : 813.59 = 268.45 : x
  2. Step 2: Convert to fraction form
    542.34/813.59 = 268.45/x
  3. Step 3: Cross multiply
    542.34x = 813.59 × 268.45
  4. Step 4: Simplify right side
    542.34x = 218,406.87
  5. Step 5: Solve for x
    x = 218,406.87/542.34
  6. Step 6: Final answer
    x = 402.71

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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.