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Finding the Third Proportional to 243,223 and 388,543

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Solution

The third proportional to 243,223 and 388,543 is: 620,688.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,223 : 388,543 = 388,543 : x
  2. Step 2: Convert to fraction form
    243,223/388,543 = 388,543/x
  3. Step 3: Cross multiply
    243,223x = 388,543 × 388,543
  4. Step 4: Simplify right side
    243,223x = 150,965,662,849
  5. Step 5: Solve for x
    x = 150,965,662,849/243,223
  6. Step 6: Final answer
    x = 620,688.27

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.