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Finding the Fourth Proportional to 542.31, 813.78 and 498.19

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Solution

The fourth proportional to 542.31, 813.78 and 498.19 is: 747.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.31 : 813.78 = 498.19 : x
  2. Step 2: Convert to fraction form
    542.31/813.78 = 498.19/x
  3. Step 3: Cross multiply
    542.31x = 813.78 × 498.19
  4. Step 4: Simplify right side
    542.31x = 405,419.83
  5. Step 5: Solve for x
    x = 405,419.83/542.31
  6. Step 6: Final answer
    x = 747.59

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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.