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Finding the Third Proportional to 631,876 and 1,391,840

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Solution

The third proportional to 631,876 and 1,391,840 is: 3,065,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,876 : 1,391,840 = 1,391,840 : x
  2. Step 2: Convert to fraction form
    631,876/1,391,840 = 1,391,840/x
  3. Step 3: Cross multiply
    631,876x = 1,391,840 × 1,391,840
  4. Step 4: Simplify right side
    631,876x = 1,937,218,585,600
  5. Step 5: Solve for x
    x = 1,937,218,585,600/631,876
  6. Step 6: Final answer
    x = 3,065,820.80

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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.