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Finding the Third Proportional to 143,859 and 215,791

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Solution

The third proportional to 143,859 and 215,791 is: 323,690.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,859 : 215,791 = 215,791 : x
  2. Step 2: Convert to fraction form
    143,859/215,791 = 215,791/x
  3. Step 3: Cross multiply
    143,859x = 215,791 × 215,791
  4. Step 4: Simplify right side
    143,859x = 46,565,755,681
  5. Step 5: Solve for x
    x = 46,565,755,681/143,859
  6. Step 6: Final answer
    x = 323,690.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.