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Finding the Third Proportional to 200,128 and 281,472

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Solution

The third proportional to 200,128 and 281,472 is: 395,879.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,128 : 281,472 = 281,472 : x
  2. Step 2: Convert to fraction form
    200,128/281,472 = 281,472/x
  3. Step 3: Cross multiply
    200,128x = 281,472 × 281,472
  4. Step 4: Simplify right side
    200,128x = 79,226,486,784
  5. Step 5: Solve for x
    x = 79,226,486,784/200,128
  6. Step 6: Final answer
    x = 395,879.07

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.