Home / 279,816.85-419,785.26-90,288.07

Finding the Fourth Proportional to 279,816.85, 419,785.26 and 90,288.07

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Solution

The fourth proportional to 279,816.85, 419,785.26 and 90,288.07 is: 135,451.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,816.85 : 419,785.26 = 90,288.07 : x
  2. Step 2: Convert to fraction form
    279,816.85/419,785.26 = 90,288.07/x
  3. Step 3: Cross multiply
    279,816.85x = 419,785.26 × 90,288.07
  4. Step 4: Simplify right side
    279,816.85x = 37,901,600,939.85
  5. Step 5: Solve for x
    x = 37,901,600,939.85/279,816.85
  6. Step 6: Final answer
    x = 135,451.46

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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.