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Finding the Fourth Proportional to 1,192.46, 1,788.72 and 326.78

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Solution

The fourth proportional to 1,192.46, 1,788.72 and 326.78 is: 490.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192.46 : 1,788.72 = 326.78 : x
  2. Step 2: Convert to fraction form
    1,192.46/1,788.72 = 326.78/x
  3. Step 3: Cross multiply
    1,192.46x = 1,788.72 × 326.78
  4. Step 4: Simplify right side
    1,192.46x = 584,517.92
  5. Step 5: Solve for x
    x = 584,517.92/1,192.46
  6. Step 6: Final answer
    x = 490.18

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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.