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Finding the Third Proportional to 159,658 and 221,989

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Solution

The third proportional to 159,658 and 221,989 is: 308,654.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,658 : 221,989 = 221,989 : x
  2. Step 2: Convert to fraction form
    159,658/221,989 = 221,989/x
  3. Step 3: Cross multiply
    159,658x = 221,989 × 221,989
  4. Step 4: Simplify right side
    159,658x = 49,279,116,121
  5. Step 5: Solve for x
    x = 49,279,116,121/159,658
  6. Step 6: Final answer
    x = 308,654.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.