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Finding the Fourth Proportional to 451.26, 621.72 and 326.70

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Solution

The fourth proportional to 451.26, 621.72 and 326.70 is: 450.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.26 : 621.72 = 326.70 : x
  2. Step 2: Convert to fraction form
    451.26/621.72 = 326.70/x
  3. Step 3: Cross multiply
    451.26x = 621.72 × 326.70
  4. Step 4: Simplify right side
    451.26x = 203,115.92
  5. Step 5: Solve for x
    x = 203,115.92/451.26
  6. Step 6: Final answer
    x = 450.11

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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.