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Finding the Fourth Proportional to 398,874.57, 550,447.67 and 217,586.73

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Solution

The fourth proportional to 398,874.57, 550,447.67 and 217,586.73 is: 300,270.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,874.57 : 550,447.67 = 217,586.73 : x
  2. Step 2: Convert to fraction form
    398,874.57/550,447.67 = 217,586.73/x
  3. Step 3: Cross multiply
    398,874.57x = 550,447.67 × 217,586.73
  4. Step 4: Simplify right side
    398,874.57x = 119,770,107,463.49
  5. Step 5: Solve for x
    x = 119,770,107,463.49/398,874.57
  6. Step 6: Final answer
    x = 300,270.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.