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Finding the Fourth Proportional to 424.32, 635.28 and 326.76

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Solution

The fourth proportional to 424.32, 635.28 and 326.76 is: 489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.32 : 635.28 = 326.76 : x
  2. Step 2: Convert to fraction form
    424.32/635.28 = 326.76/x
  3. Step 3: Cross multiply
    424.32x = 635.28 × 326.76
  4. Step 4: Simplify right side
    424.32x = 207,584.09
  5. Step 5: Solve for x
    x = 207,584.09/424.32
  6. Step 6: Final answer
    x = 489.22

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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.