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Finding the Third Proportional to 310,574 and 668,660

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Solution

The third proportional to 310,574 and 668,660 is: 1,439,612.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,574 : 668,660 = 668,660 : x
  2. Step 2: Convert to fraction form
    310,574/668,660 = 668,660/x
  3. Step 3: Cross multiply
    310,574x = 668,660 × 668,660
  4. Step 4: Simplify right side
    310,574x = 447,106,195,600
  5. Step 5: Solve for x
    x = 447,106,195,600/310,574
  6. Step 6: Final answer
    x = 1,439,612.45

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.