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Finding the Fourth Proportional to 542.56, 813.66 and 218.04

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Solution

The fourth proportional to 542.56, 813.66 and 218.04 is: 326.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.56 : 813.66 = 218.04 : x
  2. Step 2: Convert to fraction form
    542.56/813.66 = 218.04/x
  3. Step 3: Cross multiply
    542.56x = 813.66 × 218.04
  4. Step 4: Simplify right side
    542.56x = 177,410.43
  5. Step 5: Solve for x
    x = 177,410.43/542.56
  6. Step 6: Final answer
    x = 326.99

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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.