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Finding the Fourth Proportional to 641.68, 962.42 and 179.51

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Solution

The fourth proportional to 641.68, 962.42 and 179.51 is: 269.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.68 : 962.42 = 179.51 : x
  2. Step 2: Convert to fraction form
    641.68/962.42 = 179.51/x
  3. Step 3: Cross multiply
    641.68x = 962.42 × 179.51
  4. Step 4: Simplify right side
    641.68x = 172,758.30
  5. Step 5: Solve for x
    x = 172,758.30/641.68
  6. Step 6: Final answer
    x = 269.23

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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.