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Finding the Third Proportional to 678.38 and 1,549.13

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Solution

The third proportional to 678.38 and 1,549.13 is: 3,537.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.38 : 1,549.13 = 1,549.13 : x
  2. Step 2: Convert to fraction form
    678.38/1,549.13 = 1,549.13/x
  3. Step 3: Cross multiply
    678.38x = 1,549.13 × 1,549.13
  4. Step 4: Simplify right side
    678.38x = 2,399,788.27
  5. Step 5: Solve for x
    x = 2,399,788.27/678.38
  6. Step 6: Final answer
    x = 3,537.55

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Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.