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Finding the Fourth Proportional to 479,716.91, 661,991.91 and 261,921.58

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Solution

The fourth proportional to 479,716.91, 661,991.91 and 261,921.58 is: 361,442.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,716.91 : 661,991.91 = 261,921.58 : x
  2. Step 2: Convert to fraction form
    479,716.91/661,991.91 = 261,921.58/x
  3. Step 3: Cross multiply
    479,716.91x = 661,991.91 × 261,921.58
  4. Step 4: Simplify right side
    479,716.91x = 173,389,964,377.23
  5. Step 5: Solve for x
    x = 173,389,964,377.23/479,716.91
  6. Step 6: Final answer
    x = 361,442.26

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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.