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Finding the Third Proportional to 268,730 and 388,469

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Solution

The third proportional to 268,730 and 388,469 is: 561,560.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,730 : 388,469 = 388,469 : x
  2. Step 2: Convert to fraction form
    268,730/388,469 = 388,469/x
  3. Step 3: Cross multiply
    268,730x = 388,469 × 388,469
  4. Step 4: Simplify right side
    268,730x = 150,908,163,961
  5. Step 5: Solve for x
    x = 150,908,163,961/268,730
  6. Step 6: Final answer
    x = 561,560.54

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.