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Finding the Third Proportional to 142,722 and 310,866

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Solution

The third proportional to 142,722 and 310,866 is: 677,104.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,722 : 310,866 = 310,866 : x
  2. Step 2: Convert to fraction form
    142,722/310,866 = 310,866/x
  3. Step 3: Cross multiply
    142,722x = 310,866 × 310,866
  4. Step 4: Simplify right side
    142,722x = 96,637,669,956
  5. Step 5: Solve for x
    x = 96,637,669,956/142,722
  6. Step 6: Final answer
    x = 677,104.23

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.