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Finding the Fourth Proportional to 573.39, 861.21 and 542.36

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Solution

The fourth proportional to 573.39, 861.21 and 542.36 is: 814.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.39 : 861.21 = 542.36 : x
  2. Step 2: Convert to fraction form
    573.39/861.21 = 542.36/x
  3. Step 3: Cross multiply
    573.39x = 861.21 × 542.36
  4. Step 4: Simplify right side
    573.39x = 467,081.55
  5. Step 5: Solve for x
    x = 467,081.55/573.39
  6. Step 6: Final answer
    x = 814.60

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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.