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Finding the Fourth Proportional to 641.44, 960.24 and 412.96

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Solution

The fourth proportional to 641.44, 960.24 and 412.96 is: 618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.44 : 960.24 = 412.96 : x
  2. Step 2: Convert to fraction form
    641.44/960.24 = 412.96/x
  3. Step 3: Cross multiply
    641.44x = 960.24 × 412.96
  4. Step 4: Simplify right side
    641.44x = 396,540.71
  5. Step 5: Solve for x
    x = 396,540.71/641.44
  6. Step 6: Final answer
    x = 618.20

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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.