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Finding the Third Proportional to 621,966 and 990,153

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Solution

The third proportional to 621,966 and 990,153 is: 1,576,296.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,966 : 990,153 = 990,153 : x
  2. Step 2: Convert to fraction form
    621,966/990,153 = 990,153/x
  3. Step 3: Cross multiply
    621,966x = 990,153 × 990,153
  4. Step 4: Simplify right side
    621,966x = 980,402,963,409
  5. Step 5: Solve for x
    x = 980,402,963,409/621,966
  6. Step 6: Final answer
    x = 1,576,296.72

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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.