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Finding the Third Proportional to 180,543 and 391,218

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Solution

The third proportional to 180,543 and 391,218 is: 847,728.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,543 : 391,218 = 391,218 : x
  2. Step 2: Convert to fraction form
    180,543/391,218 = 391,218/x
  3. Step 3: Cross multiply
    180,543x = 391,218 × 391,218
  4. Step 4: Simplify right side
    180,543x = 153,051,523,524
  5. Step 5: Solve for x
    x = 153,051,523,524/180,543
  6. Step 6: Final answer
    x = 847,728.93

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.