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Finding the Fourth Proportional to 479,496.93, 661,791.54 and 285,917.10

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Solution

The fourth proportional to 479,496.93, 661,791.54 and 285,917.10 is: 394,616.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,496.93 : 661,791.54 = 285,917.10 : x
  2. Step 2: Convert to fraction form
    479,496.93/661,791.54 = 285,917.10/x
  3. Step 3: Cross multiply
    479,496.93x = 661,791.54 × 285,917.10
  4. Step 4: Simplify right side
    479,496.93x = 189,217,517,921.33
  5. Step 5: Solve for x
    x = 189,217,517,921.33/479,496.93
  6. Step 6: Final answer
    x = 394,616.75

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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.