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Finding the Third Proportional to 140,155 and 211,908

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Solution

The third proportional to 140,155 and 211,908 is: 320,395.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,155 : 211,908 = 211,908 : x
  2. Step 2: Convert to fraction form
    140,155/211,908 = 211,908/x
  3. Step 3: Cross multiply
    140,155x = 211,908 × 211,908
  4. Step 4: Simplify right side
    140,155x = 44,905,000,464
  5. Step 5: Solve for x
    x = 44,905,000,464/140,155
  6. Step 6: Final answer
    x = 320,395.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.