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Finding the Third Proportional to 391,270 and 621,924

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Solution

The third proportional to 391,270 and 621,924 is: 988,548.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,270 : 621,924 = 621,924 : x
  2. Step 2: Convert to fraction form
    391,270/621,924 = 621,924/x
  3. Step 3: Cross multiply
    391,270x = 621,924 × 621,924
  4. Step 4: Simplify right side
    391,270x = 386,789,461,776
  5. Step 5: Solve for x
    x = 386,789,461,776/391,270
  6. Step 6: Final answer
    x = 988,548.73

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.