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Finding the Third Proportional to 639,348 and 1,386,345

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Solution

The third proportional to 639,348 and 1,386,345 is: 3,006,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,348 : 1,386,345 = 1,386,345 : x
  2. Step 2: Convert to fraction form
    639,348/1,386,345 = 1,386,345/x
  3. Step 3: Cross multiply
    639,348x = 1,386,345 × 1,386,345
  4. Step 4: Simplify right side
    639,348x = 1,921,952,459,025
  5. Step 5: Solve for x
    x = 1,921,952,459,025/639,348
  6. Step 6: Final answer
    x = 3,006,113.20

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.