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Finding the Fourth Proportional to 279,805.38, 419,768.04 and 90,276.54

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Solution

The fourth proportional to 279,805.38, 419,768.04 and 90,276.54 is: 135,434.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,805.38 : 419,768.04 = 90,276.54 : x
  2. Step 2: Convert to fraction form
    279,805.38/419,768.04 = 90,276.54/x
  3. Step 3: Cross multiply
    279,805.38x = 419,768.04 × 90,276.54
  4. Step 4: Simplify right side
    279,805.38x = 37,895,206,253.78
  5. Step 5: Solve for x
    x = 37,895,206,253.78/279,805.38
  6. Step 6: Final answer
    x = 135,434.16

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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.