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Finding the Third Proportional to 408,960 and 631,680

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Solution

The third proportional to 408,960 and 631,680 is: 975,693.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,960 : 631,680 = 631,680 : x
  2. Step 2: Convert to fraction form
    408,960/631,680 = 631,680/x
  3. Step 3: Cross multiply
    408,960x = 631,680 × 631,680
  4. Step 4: Simplify right side
    408,960x = 399,019,622,400
  5. Step 5: Solve for x
    x = 399,019,622,400/408,960
  6. Step 6: Final answer
    x = 975,693.52

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.