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Finding the Third Proportional to 209,664 and 279,339.75

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Solution

The third proportional to 209,664 and 279,339.75 is: 372,170.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,664 : 279,339.75 = 279,339.75 : x
  2. Step 2: Convert to fraction form
    209,664/279,339.75 = 279,339.75/x
  3. Step 3: Cross multiply
    209,664x = 279,339.75 × 279,339.75
  4. Step 4: Simplify right side
    209,664x = 78,030,695,930.06
  5. Step 5: Solve for x
    x = 78,030,695,930.06/209,664
  6. Step 6: Final answer
    x = 372,170.21

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.