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Finding the Fourth Proportional to 548.82, 822.17 and 432.65

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Solution

The fourth proportional to 548.82, 822.17 and 432.65 is: 648.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.82 : 822.17 = 432.65 : x
  2. Step 2: Convert to fraction form
    548.82/822.17 = 432.65/x
  3. Step 3: Cross multiply
    548.82x = 822.17 × 432.65
  4. Step 4: Simplify right side
    548.82x = 355,711.85
  5. Step 5: Solve for x
    x = 355,711.85/548.82
  6. Step 6: Final answer
    x = 648.14

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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.