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Finding the Third Proportional to 391,871.75 and 551,838.75

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Solution

The third proportional to 391,871.75 and 551,838.75 is: 777,106.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,871.75 : 551,838.75 = 551,838.75 : x
  2. Step 2: Convert to fraction form
    391,871.75/551,838.75 = 551,838.75/x
  3. Step 3: Cross multiply
    391,871.75x = 551,838.75 × 551,838.75
  4. Step 4: Simplify right side
    391,871.75x = 304,526,006,001.56
  5. Step 5: Solve for x
    x = 304,526,006,001.56/391,871.75
  6. Step 6: Final answer
    x = 777,106.30

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.