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Finding the Third Proportional to 391,609 and 605,855

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Solution

The third proportional to 391,609 and 605,855 is: 937,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,609 : 605,855 = 605,855 : x
  2. Step 2: Convert to fraction form
    391,609/605,855 = 605,855/x
  3. Step 3: Cross multiply
    391,609x = 605,855 × 605,855
  4. Step 4: Simplify right side
    391,609x = 367,060,281,025
  5. Step 5: Solve for x
    x = 367,060,281,025/391,609
  6. Step 6: Final answer
    x = 937,313.19

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.