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Finding the Fourth Proportional to 696.82, 1,045.66 and 326.56

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Solution

The fourth proportional to 696.82, 1,045.66 and 326.56 is: 490.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.82 : 1,045.66 = 326.56 : x
  2. Step 2: Convert to fraction form
    696.82/1,045.66 = 326.56/x
  3. Step 3: Cross multiply
    696.82x = 1,045.66 × 326.56
  4. Step 4: Simplify right side
    696.82x = 341,470.73
  5. Step 5: Solve for x
    x = 341,470.73/696.82
  6. Step 6: Final answer
    x = 490.04

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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.