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Finding the Fourth Proportional to 951.46, 1,427.21 and 326.91

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Solution

The fourth proportional to 951.46, 1,427.21 and 326.91 is: 490.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.46 : 1,427.21 = 326.91 : x
  2. Step 2: Convert to fraction form
    951.46/1,427.21 = 326.91/x
  3. Step 3: Cross multiply
    951.46x = 1,427.21 × 326.91
  4. Step 4: Simplify right side
    951.46x = 466,562.09
  5. Step 5: Solve for x
    x = 466,562.09/951.46
  6. Step 6: Final answer
    x = 490.36

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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.