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Finding the Fourth Proportional to 725.44, 1,000.56 and 515.92

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Solution

The fourth proportional to 725.44, 1,000.56 and 515.92 is: 711.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.44 : 1,000.56 = 515.92 : x
  2. Step 2: Convert to fraction form
    725.44/1,000.56 = 515.92/x
  3. Step 3: Cross multiply
    725.44x = 1,000.56 × 515.92
  4. Step 4: Simplify right side
    725.44x = 516,208.92
  5. Step 5: Solve for x
    x = 516,208.92/725.44
  6. Step 6: Final answer
    x = 711.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.