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Finding the Third Proportional to 351,990 and 720,382

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Solution

The third proportional to 351,990 and 720,382 is: 1,474,332.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,990 : 720,382 = 720,382 : x
  2. Step 2: Convert to fraction form
    351,990/720,382 = 720,382/x
  3. Step 3: Cross multiply
    351,990x = 720,382 × 720,382
  4. Step 4: Simplify right side
    351,990x = 518,950,225,924
  5. Step 5: Solve for x
    x = 518,950,225,924/351,990
  6. Step 6: Final answer
    x = 1,474,332.30

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.