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Finding the Fourth Proportional to 632.30, 872.88 and 396.36

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Solution

The fourth proportional to 632.30, 872.88 and 396.36 is: 547.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.30 : 872.88 = 396.36 : x
  2. Step 2: Convert to fraction form
    632.30/872.88 = 396.36/x
  3. Step 3: Cross multiply
    632.30x = 872.88 × 396.36
  4. Step 4: Simplify right side
    632.30x = 345,974.72
  5. Step 5: Solve for x
    x = 345,974.72/632.30
  6. Step 6: Final answer
    x = 547.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.