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Finding the Third Proportional to 639,604 and 1,407,992

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Solution

The third proportional to 639,604 and 1,407,992 is: 3,099,482.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,604 : 1,407,992 = 1,407,992 : x
  2. Step 2: Convert to fraction form
    639,604/1,407,992 = 1,407,992/x
  3. Step 3: Cross multiply
    639,604x = 1,407,992 × 1,407,992
  4. Step 4: Simplify right side
    639,604x = 1,982,441,472,064
  5. Step 5: Solve for x
    x = 1,982,441,472,064/639,604
  6. Step 6: Final answer
    x = 3,099,482.60

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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.