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Finding the Fourth Proportional to 725.99, 1,001.78 and 411.29

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Solution

The fourth proportional to 725.99, 1,001.78 and 411.29 is: 567.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.99 : 1,001.78 = 411.29 : x
  2. Step 2: Convert to fraction form
    725.99/1,001.78 = 411.29/x
  3. Step 3: Cross multiply
    725.99x = 1,001.78 × 411.29
  4. Step 4: Simplify right side
    725.99x = 412,022.10
  5. Step 5: Solve for x
    x = 412,022.10/725.99
  6. Step 6: Final answer
    x = 567.53

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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.