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Finding the Fourth Proportional to 479,563.82, 661,814.16 and 261,785.42

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Solution

The fourth proportional to 479,563.82, 661,814.16 and 261,785.42 is: 361,272.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,563.82 : 661,814.16 = 261,785.42 : x
  2. Step 2: Convert to fraction form
    479,563.82/661,814.16 = 261,785.42/x
  3. Step 3: Cross multiply
    479,563.82x = 661,814.16 × 261,785.42
  4. Step 4: Simplify right side
    479,563.82x = 173,253,297,837.55
  5. Step 5: Solve for x
    x = 173,253,297,837.55/479,563.82
  6. Step 6: Final answer
    x = 361,272.66

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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.