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Finding the Third Proportional to 179,128.50 and 391,473

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Solution

The third proportional to 179,128.50 and 391,473 is: 855,537.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,128.50 : 391,473 = 391,473 : x
  2. Step 2: Convert to fraction form
    179,128.50/391,473 = 391,473/x
  3. Step 3: Cross multiply
    179,128.50x = 391,473 × 391,473
  4. Step 4: Simplify right side
    179,128.50x = 153,251,109,729
  5. Step 5: Solve for x
    x = 153,251,109,729/179,128.50
  6. Step 6: Final answer
    x = 855,537.28

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.