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Finding the Third Proportional to 661,871.25 and 990,133.88

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Solution

The third proportional to 661,871.25 and 990,133.88 is: 1,481,202.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,871.25 : 990,133.88 = 990,133.88 : x
  2. Step 2: Convert to fraction form
    661,871.25/990,133.88 = 990,133.88/x
  3. Step 3: Cross multiply
    661,871.25x = 990,133.88 × 990,133.88
  4. Step 4: Simplify right side
    661,871.25x = 980,365,090,422.52
  5. Step 5: Solve for x
    x = 980,365,090,422.52/661,871.25
  6. Step 6: Final answer
    x = 1,481,202.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.