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Finding the Fourth Proportional to 725.03, 1,086.68 and 417.03

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Solution

The fourth proportional to 725.03, 1,086.68 and 417.03 is: 625.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.03 : 1,086.68 = 417.03 : x
  2. Step 2: Convert to fraction form
    725.03/1,086.68 = 417.03/x
  3. Step 3: Cross multiply
    725.03x = 1,086.68 × 417.03
  4. Step 4: Simplify right side
    725.03x = 453,179.20
  5. Step 5: Solve for x
    x = 453,179.20/725.03
  6. Step 6: Final answer
    x = 625.05

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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.