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Finding the Third Proportional to 251,389 and 351,644

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Solution

The third proportional to 251,389 and 351,644 is: 491,881.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,389 : 351,644 = 351,644 : x
  2. Step 2: Convert to fraction form
    251,389/351,644 = 351,644/x
  3. Step 3: Cross multiply
    251,389x = 351,644 × 351,644
  4. Step 4: Simplify right side
    251,389x = 123,653,502,736
  5. Step 5: Solve for x
    x = 123,653,502,736/251,389
  6. Step 6: Final answer
    x = 491,881.12

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.