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Finding the Third Proportional to 153,981 and 225,990

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Solution

The third proportional to 153,981 and 225,990 is: 331,673.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,981 : 225,990 = 225,990 : x
  2. Step 2: Convert to fraction form
    153,981/225,990 = 225,990/x
  3. Step 3: Cross multiply
    153,981x = 225,990 × 225,990
  4. Step 4: Simplify right side
    153,981x = 51,071,480,100
  5. Step 5: Solve for x
    x = 51,071,480,100/153,981
  6. Step 6: Final answer
    x = 331,673.91

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.