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Finding the Fourth Proportional to 725.70, 1,088.55 and 177.88

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Solution

The fourth proportional to 725.70, 1,088.55 and 177.88 is: 266.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.70 : 1,088.55 = 177.88 : x
  2. Step 2: Convert to fraction form
    725.70/1,088.55 = 177.88/x
  3. Step 3: Cross multiply
    725.70x = 1,088.55 × 177.88
  4. Step 4: Simplify right side
    725.70x = 193,631.27
  5. Step 5: Solve for x
    x = 193,631.27/725.70
  6. Step 6: Final answer
    x = 266.82

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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.