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Finding the Third Proportional to 289,888.50 and 422,236.50

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Solution

The third proportional to 289,888.50 and 422,236.50 is: 615,007.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,888.50 : 422,236.50 = 422,236.50 : x
  2. Step 2: Convert to fraction form
    289,888.50/422,236.50 = 422,236.50/x
  3. Step 3: Cross multiply
    289,888.50x = 422,236.50 × 422,236.50
  4. Step 4: Simplify right side
    289,888.50x = 178,283,661,932.25
  5. Step 5: Solve for x
    x = 178,283,661,932.25/289,888.50
  6. Step 6: Final answer
    x = 615,007.71

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.