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Finding the Third Proportional to 316,767 and 638,718

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Solution

The third proportional to 316,767 and 638,718 is: 1,287,888.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,767 : 638,718 = 638,718 : x
  2. Step 2: Convert to fraction form
    316,767/638,718 = 638,718/x
  3. Step 3: Cross multiply
    316,767x = 638,718 × 638,718
  4. Step 4: Simplify right side
    316,767x = 407,960,683,524
  5. Step 5: Solve for x
    x = 407,960,683,524/316,767
  6. Step 6: Final answer
    x = 1,287,888.84

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.