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Finding the Fourth Proportional to 290,469.12, 400,839.39 and 161,404.26

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Solution

The fourth proportional to 290,469.12, 400,839.39 and 161,404.26 is: 222,733.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,469.12 : 400,839.39 = 161,404.26 : x
  2. Step 2: Convert to fraction form
    290,469.12/400,839.39 = 161,404.26/x
  3. Step 3: Cross multiply
    290,469.12x = 400,839.39 × 161,404.26
  4. Step 4: Simplify right side
    290,469.12x = 64,697,185,121.80
  5. Step 5: Solve for x
    x = 64,697,185,121.80/290,469.12
  6. Step 6: Final answer
    x = 222,733.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.