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Finding the Fourth Proportional to 908.68, 1,363.28 and 323.82

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Solution

The fourth proportional to 908.68, 1,363.28 and 323.82 is: 485.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.68 : 1,363.28 = 323.82 : x
  2. Step 2: Convert to fraction form
    908.68/1,363.28 = 323.82/x
  3. Step 3: Cross multiply
    908.68x = 1,363.28 × 323.82
  4. Step 4: Simplify right side
    908.68x = 441,452.30
  5. Step 5: Solve for x
    x = 441,452.30/908.68
  6. Step 6: Final answer
    x = 485.82

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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.