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Finding the Fourth Proportional to 422,456.54, 633,713.97 and 122,939.60

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Solution

The fourth proportional to 422,456.54, 633,713.97 and 122,939.60 is: 184,417.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,456.54 : 633,713.97 = 122,939.60 : x
  2. Step 2: Convert to fraction form
    422,456.54/633,713.97 = 122,939.60/x
  3. Step 3: Cross multiply
    422,456.54x = 633,713.97 × 122,939.60
  4. Step 4: Simplify right side
    422,456.54x = 77,908,541,986.21
  5. Step 5: Solve for x
    x = 77,908,541,986.21/422,456.54
  6. Step 6: Final answer
    x = 184,417.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.