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Finding the Fourth Proportional to 398,958.86, 598,077.67 and 270,917.87

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Solution

The fourth proportional to 398,958.86, 598,077.67 and 270,917.87 is: 406,131.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,958.86 : 598,077.67 = 270,917.87 : x
  2. Step 2: Convert to fraction form
    398,958.86/598,077.67 = 270,917.87/x
  3. Step 3: Cross multiply
    398,958.86x = 598,077.67 × 270,917.87
  4. Step 4: Simplify right side
    398,958.86x = 162,029,928,450.96
  5. Step 5: Solve for x
    x = 162,029,928,450.96/398,958.86
  6. Step 6: Final answer
    x = 406,131.92

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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.