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Finding the Third Proportional to 178,278.50 and 391,544

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Solution

The third proportional to 178,278.50 and 391,544 is: 859,928.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,278.50 : 391,544 = 391,544 : x
  2. Step 2: Convert to fraction form
    178,278.50/391,544 = 391,544/x
  3. Step 3: Cross multiply
    178,278.50x = 391,544 × 391,544
  4. Step 4: Simplify right side
    178,278.50x = 153,306,703,936
  5. Step 5: Solve for x
    x = 153,306,703,936/178,278.50
  6. Step 6: Final answer
    x = 859,928.17

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.