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Finding the Third Proportional to 418.88 and 877.13

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Solution

The third proportional to 418.88 and 877.13 is: 1,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.88 : 877.13 = 877.13 : x
  2. Step 2: Convert to fraction form
    418.88/877.13 = 877.13/x
  3. Step 3: Cross multiply
    418.88x = 877.13 × 877.13
  4. Step 4: Simplify right side
    418.88x = 769,348.27
  5. Step 5: Solve for x
    x = 769,348.27/418.88
  6. Step 6: Final answer
    x = 1,836.70

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.