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Finding the Fourth Proportional to 803.04, 1,205.37 and 542.22

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Solution

The fourth proportional to 803.04, 1,205.37 and 542.22 is: 813.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.04 : 1,205.37 = 542.22 : x
  2. Step 2: Convert to fraction form
    803.04/1,205.37 = 542.22/x
  3. Step 3: Cross multiply
    803.04x = 1,205.37 × 542.22
  4. Step 4: Simplify right side
    803.04x = 653,575.72
  5. Step 5: Solve for x
    x = 653,575.72/803.04
  6. Step 6: Final answer
    x = 813.88

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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.