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Finding the Third Proportional to 187,989 and 291,228

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Solution

The third proportional to 187,989 and 291,228 is: 451,163.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,989 : 291,228 = 291,228 : x
  2. Step 2: Convert to fraction form
    187,989/291,228 = 291,228/x
  3. Step 3: Cross multiply
    187,989x = 291,228 × 291,228
  4. Step 4: Simplify right side
    187,989x = 84,813,747,984
  5. Step 5: Solve for x
    x = 84,813,747,984/187,989
  6. Step 6: Final answer
    x = 451,163.36

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.