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Finding the Third Proportional to 144,990 and 319,412

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Solution

The third proportional to 144,990 and 319,412 is: 703,662.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,990 : 319,412 = 319,412 : x
  2. Step 2: Convert to fraction form
    144,990/319,412 = 319,412/x
  3. Step 3: Cross multiply
    144,990x = 319,412 × 319,412
  4. Step 4: Simplify right side
    144,990x = 102,024,025,744
  5. Step 5: Solve for x
    x = 102,024,025,744/144,990
  6. Step 6: Final answer
    x = 703,662.50

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.