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Finding the Third Proportional to 180,356 and 391,816

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Solution

The third proportional to 180,356 and 391,816 is: 851,204.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,356 : 391,816 = 391,816 : x
  2. Step 2: Convert to fraction form
    180,356/391,816 = 391,816/x
  3. Step 3: Cross multiply
    180,356x = 391,816 × 391,816
  4. Step 4: Simplify right side
    180,356x = 153,519,777,856
  5. Step 5: Solve for x
    x = 153,519,777,856/180,356
  6. Step 6: Final answer
    x = 851,204.16

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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.