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Finding the Third Proportional to 479 and 748.25

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Solution

The third proportional to 479 and 748.25 is: 1,168.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    479 : 748.25 = 748.25 : x
  2. Step 2: Convert to fraction form
    479/748.25 = 748.25/x
  3. Step 3: Cross multiply
    479x = 748.25 × 748.25
  4. Step 4: Simplify right side
    479x = 559,878.06
  5. Step 5: Solve for x
    x = 559,878.06/479
  6. Step 6: Final answer
    x = 1,168.85

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.