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Finding the Third Proportional to 987,840 and 2,122,956

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Solution

The third proportional to 987,840 and 2,122,956 is: 4,562,421.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,840 : 2,122,956 = 2,122,956 : x
  2. Step 2: Convert to fraction form
    987,840/2,122,956 = 2,122,956/x
  3. Step 3: Cross multiply
    987,840x = 2,122,956 × 2,122,956
  4. Step 4: Simplify right side
    987,840x = 4,506,942,177,936
  5. Step 5: Solve for x
    x = 4,506,942,177,936/987,840
  6. Step 6: Final answer
    x = 4,562,421.22

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.