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Finding the Third Proportional to 639,846 and 1,400,220

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Solution

The third proportional to 639,846 and 1,400,220 is: 3,064,199.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,846 : 1,400,220 = 1,400,220 : x
  2. Step 2: Convert to fraction form
    639,846/1,400,220 = 1,400,220/x
  3. Step 3: Cross multiply
    639,846x = 1,400,220 × 1,400,220
  4. Step 4: Simplify right side
    639,846x = 1,960,616,048,400
  5. Step 5: Solve for x
    x = 1,960,616,048,400/639,846
  6. Step 6: Final answer
    x = 3,064,199.90

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.