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Finding the Third Proportional to 691.03 and 1,480.78

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Solution

The third proportional to 691.03 and 1,480.78 is: 3,173.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.03 : 1,480.78 = 1,480.78 : x
  2. Step 2: Convert to fraction form
    691.03/1,480.78 = 1,480.78/x
  3. Step 3: Cross multiply
    691.03x = 1,480.78 × 1,480.78
  4. Step 4: Simplify right side
    691.03x = 2,192,713.11
  5. Step 5: Solve for x
    x = 2,192,713.11/691.03
  6. Step 6: Final answer
    x = 3,173.10

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.