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Finding the Fourth Proportional to 399,247.46, 550,961.61 and 220,399.46

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Solution

The fourth proportional to 399,247.46, 550,961.61 and 220,399.46 is: 304,151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,247.46 : 550,961.61 = 220,399.46 : x
  2. Step 2: Convert to fraction form
    399,247.46/550,961.61 = 220,399.46/x
  3. Step 3: Cross multiply
    399,247.46x = 550,961.61 × 220,399.46
  4. Step 4: Simplify right side
    399,247.46x = 121,431,641,324.73
  5. Step 5: Solve for x
    x = 121,431,641,324.73/399,247.46
  6. Step 6: Final answer
    x = 304,151.32

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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.