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Finding the Fourth Proportional to 725.09, 1,000.38 and 410.31

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Solution

The fourth proportional to 725.09, 1,000.38 and 410.31 is: 566.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.09 : 1,000.38 = 410.31 : x
  2. Step 2: Convert to fraction form
    725.09/1,000.38 = 410.31/x
  3. Step 3: Cross multiply
    725.09x = 1,000.38 × 410.31
  4. Step 4: Simplify right side
    725.09x = 410,465.92
  5. Step 5: Solve for x
    x = 410,465.92/725.09
  6. Step 6: Final answer
    x = 566.09

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1.5x scale

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.