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Finding the Third Proportional to 978,683 and 2,156,041

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Solution

The third proportional to 978,683 and 2,156,041 is: 4,749,763.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,683 : 2,156,041 = 2,156,041 : x
  2. Step 2: Convert to fraction form
    978,683/2,156,041 = 2,156,041/x
  3. Step 3: Cross multiply
    978,683x = 2,156,041 × 2,156,041
  4. Step 4: Simplify right side
    978,683x = 4,648,512,793,681
  5. Step 5: Solve for x
    x = 4,648,512,793,681/978,683
  6. Step 6: Final answer
    x = 4,749,763.50

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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.