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Finding the Third Proportional to 268,764 and 388,509

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Solution

The third proportional to 268,764 and 388,509 is: 561,605.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,764 : 388,509 = 388,509 : x
  2. Step 2: Convert to fraction form
    268,764/388,509 = 388,509/x
  3. Step 3: Cross multiply
    268,764x = 388,509 × 388,509
  4. Step 4: Simplify right side
    268,764x = 150,939,243,081
  5. Step 5: Solve for x
    x = 150,939,243,081/268,764
  6. Step 6: Final answer
    x = 561,605.14

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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.