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Finding the Fourth Proportional to 290,105.28, 435,179 and 121,456

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Solution

The fourth proportional to 290,105.28, 435,179 and 121,456 is: 182,192.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,105.28 : 435,179 = 121,456 : x
  2. Step 2: Convert to fraction form
    290,105.28/435,179 = 121,456/x
  3. Step 3: Cross multiply
    290,105.28x = 435,179 × 121,456
  4. Step 4: Simplify right side
    290,105.28x = 52,855,100,624
  5. Step 5: Solve for x
    x = 52,855,100,624/290,105.28
  6. Step 6: Final answer
    x = 182,192.83

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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.