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Finding the Fourth Proportional to 573.96, 861.48 and 487.56

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Solution

The fourth proportional to 573.96, 861.48 and 487.56 is: 731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.96 : 861.48 = 487.56 : x
  2. Step 2: Convert to fraction form
    573.96/861.48 = 487.56/x
  3. Step 3: Cross multiply
    573.96x = 861.48 × 487.56
  4. Step 4: Simplify right side
    573.96x = 420,023.19
  5. Step 5: Solve for x
    x = 420,023.19/573.96
  6. Step 6: Final answer
    x = 731.80

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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.