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Finding the Fourth Proportional to 548.23, 818.73 and 487.75

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Solution

The fourth proportional to 548.23, 818.73 and 487.75 is: 728.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.23 : 818.73 = 487.75 : x
  2. Step 2: Convert to fraction form
    548.23/818.73 = 487.75/x
  3. Step 3: Cross multiply
    548.23x = 818.73 × 487.75
  4. Step 4: Simplify right side
    548.23x = 399,335.56
  5. Step 5: Solve for x
    x = 399,335.56/548.23
  6. Step 6: Final answer
    x = 728.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.