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Finding the Fourth Proportional to 641.04, 961.46 and 178.71

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Solution

The fourth proportional to 641.04, 961.46 and 178.71 is: 268.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.04 : 961.46 = 178.71 : x
  2. Step 2: Convert to fraction form
    641.04/961.46 = 178.71/x
  3. Step 3: Cross multiply
    641.04x = 961.46 × 178.71
  4. Step 4: Simplify right side
    641.04x = 171,821.62
  5. Step 5: Solve for x
    x = 171,821.62/641.04
  6. Step 6: Final answer
    x = 268.04

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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.