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Finding the Fourth Proportional to 641.81, 962.72 and 179.55

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Solution

The fourth proportional to 641.81, 962.72 and 179.55 is: 269.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.81 : 962.72 = 179.55 : x
  2. Step 2: Convert to fraction form
    641.81/962.72 = 179.55/x
  3. Step 3: Cross multiply
    641.81x = 962.72 × 179.55
  4. Step 4: Simplify right side
    641.81x = 172,856.15
  5. Step 5: Solve for x
    x = 172,856.15/641.81
  6. Step 6: Final answer
    x = 269.33

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Similar ratio
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1.5x scale

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.