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Finding the Third Proportional to 422,934.50 and 622,719.75

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Solution

The third proportional to 422,934.50 and 622,719.75 is: 916,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,934.50 : 622,719.75 = 622,719.75 : x
  2. Step 2: Convert to fraction form
    422,934.50/622,719.75 = 622,719.75/x
  3. Step 3: Cross multiply
    422,934.50x = 622,719.75 × 622,719.75
  4. Step 4: Simplify right side
    422,934.50x = 387,779,887,040.06
  5. Step 5: Solve for x
    x = 387,779,887,040.06/422,934.50
  6. Step 6: Final answer
    x = 916,879.30

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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.