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Finding the Fourth Proportional to 548.29, 822.75 and 426.79

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Solution

The fourth proportional to 548.29, 822.75 and 426.79 is: 640.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.29 : 822.75 = 426.79 : x
  2. Step 2: Convert to fraction form
    548.29/822.75 = 426.79/x
  3. Step 3: Cross multiply
    548.29x = 822.75 × 426.79
  4. Step 4: Simplify right side
    548.29x = 351,141.47
  5. Step 5: Solve for x
    x = 351,141.47/548.29
  6. Step 6: Final answer
    x = 640.43

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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.