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Finding the Fourth Proportional to 399,682.44, 551,544.60 and 218,391.48

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Solution

The fourth proportional to 399,682.44, 551,544.60 and 218,391.48 is: 301,370.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,682.44 : 551,544.60 = 218,391.48 : x
  2. Step 2: Convert to fraction form
    399,682.44/551,544.60 = 218,391.48/x
  3. Step 3: Cross multiply
    399,682.44x = 551,544.60 × 218,391.48
  4. Step 4: Simplify right side
    399,682.44x = 120,452,641,480.01
  5. Step 5: Solve for x
    x = 120,452,641,480.01/399,682.44
  6. Step 6: Final answer
    x = 301,370.86

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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.