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Finding the Third Proportional to 201,290 and 411,320

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Solution

The third proportional to 201,290 and 411,320 is: 840,499.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,290 : 411,320 = 411,320 : x
  2. Step 2: Convert to fraction form
    201,290/411,320 = 411,320/x
  3. Step 3: Cross multiply
    201,290x = 411,320 × 411,320
  4. Step 4: Simplify right side
    201,290x = 169,184,142,400
  5. Step 5: Solve for x
    x = 169,184,142,400/201,290
  6. Step 6: Final answer
    x = 840,499.49

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.