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Finding the Third Proportional to 639,495 and 1,381,455

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Solution

The third proportional to 639,495 and 1,381,455 is: 2,984,257.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,495 : 1,381,455 = 1,381,455 : x
  2. Step 2: Convert to fraction form
    639,495/1,381,455 = 1,381,455/x
  3. Step 3: Cross multiply
    639,495x = 1,381,455 × 1,381,455
  4. Step 4: Simplify right side
    639,495x = 1,908,417,917,025
  5. Step 5: Solve for x
    x = 1,908,417,917,025/639,495
  6. Step 6: Final answer
    x = 2,984,257.76

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.