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Finding the Third Proportional to 409,284 and 631,422

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Solution

The third proportional to 409,284 and 631,422 is: 974,124.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,284 : 631,422 = 631,422 : x
  2. Step 2: Convert to fraction form
    409,284/631,422 = 631,422/x
  3. Step 3: Cross multiply
    409,284x = 631,422 × 631,422
  4. Step 4: Simplify right side
    409,284x = 398,693,742,084
  5. Step 5: Solve for x
    x = 398,693,742,084/409,284
  6. Step 6: Final answer
    x = 974,124.92

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.