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Finding the Third Proportional to 142,887 and 313,422

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Solution

The third proportional to 142,887 and 313,422 is: 687,489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,887 : 313,422 = 313,422 : x
  2. Step 2: Convert to fraction form
    142,887/313,422 = 313,422/x
  3. Step 3: Cross multiply
    142,887x = 313,422 × 313,422
  4. Step 4: Simplify right side
    142,887x = 98,233,350,084
  5. Step 5: Solve for x
    x = 98,233,350,084/142,887
  6. Step 6: Final answer
    x = 687,489.77

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.