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Finding the Fourth Proportional to 397,105.92, 548,010.41 and 215,817.86

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Solution

The fourth proportional to 397,105.92, 548,010.41 and 215,817.86 is: 297,830.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,105.92 : 548,010.41 = 215,817.86 : x
  2. Step 2: Convert to fraction form
    397,105.92/548,010.41 = 215,817.86/x
  3. Step 3: Cross multiply
    397,105.92x = 548,010.41 × 215,817.86
  4. Step 4: Simplify right side
    397,105.92x = 118,270,432,997.07
  5. Step 5: Solve for x
    x = 118,270,432,997.07/397,105.92
  6. Step 6: Final answer
    x = 297,830.95

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1.5x scale

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.