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Finding the Fourth Proportional to 725.38, 1,088.05 and 177.56

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Solution

The fourth proportional to 725.38, 1,088.05 and 177.56 is: 266.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.38 : 1,088.05 = 177.56 : x
  2. Step 2: Convert to fraction form
    725.38/1,088.05 = 177.56/x
  3. Step 3: Cross multiply
    725.38x = 1,088.05 × 177.56
  4. Step 4: Simplify right side
    725.38x = 193,188.72
  5. Step 5: Solve for x
    x = 193,188.72/725.38
  6. Step 6: Final answer
    x = 266.33

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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.