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Finding the Third Proportional to 209,739 and 314,631

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Solution

The third proportional to 209,739 and 314,631 is: 471,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,739 : 314,631 = 314,631 : x
  2. Step 2: Convert to fraction form
    209,739/314,631 = 314,631/x
  3. Step 3: Cross multiply
    209,739x = 314,631 × 314,631
  4. Step 4: Simplify right side
    209,739x = 98,992,666,161
  5. Step 5: Solve for x
    x = 98,992,666,161/209,739
  6. Step 6: Final answer
    x = 471,980.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.