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Finding the Fourth Proportional to 290,945.44, 436,418.70 and 80,583.94

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Solution

The fourth proportional to 290,945.44, 436,418.70 and 80,583.94 is: 120,876.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,945.44 : 436,418.70 = 80,583.94 : x
  2. Step 2: Convert to fraction form
    290,945.44/436,418.70 = 80,583.94/x
  3. Step 3: Cross multiply
    290,945.44x = 436,418.70 × 80,583.94
  4. Step 4: Simplify right side
    290,945.44x = 35,168,338,335.68
  5. Step 5: Solve for x
    x = 35,168,338,335.68/290,945.44
  6. Step 6: Final answer
    x = 120,876.06

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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.