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Finding the Third Proportional to 621,727 and 988,640

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Solution

The third proportional to 621,727 and 988,640 is: 1,572,087.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,727 : 988,640 = 988,640 : x
  2. Step 2: Convert to fraction form
    621,727/988,640 = 988,640/x
  3. Step 3: Cross multiply
    621,727x = 988,640 × 988,640
  4. Step 4: Simplify right side
    621,727x = 977,409,049,600
  5. Step 5: Solve for x
    x = 977,409,049,600/621,727
  6. Step 6: Final answer
    x = 1,572,087.19

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.