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Finding the Fourth Proportional to 725.03, 1,000.55 and 410.30

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Solution

The fourth proportional to 725.03, 1,000.55 and 410.30 is: 566.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.03 : 1,000.55 = 410.30 : x
  2. Step 2: Convert to fraction form
    725.03/1,000.55 = 410.30/x
  3. Step 3: Cross multiply
    725.03x = 1,000.55 × 410.30
  4. Step 4: Simplify right side
    725.03x = 410,525.44
  5. Step 5: Solve for x
    x = 410,525.44/725.03
  6. Step 6: Final answer
    x = 566.22

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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.