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Finding the Fourth Proportional to 479,644.11, 661,910.30 and 261,853.13

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Solution

The fourth proportional to 479,644.11, 661,910.30 and 261,853.13 is: 361,358.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,644.11 : 661,910.30 = 261,853.13 : x
  2. Step 2: Convert to fraction form
    479,644.11/661,910.30 = 261,853.13/x
  3. Step 3: Cross multiply
    479,644.11x = 661,910.30 × 261,853.13
  4. Step 4: Simplify right side
    479,644.11x = 173,323,279,215.42
  5. Step 5: Solve for x
    x = 173,323,279,215.42/479,644.11
  6. Step 6: Final answer
    x = 361,358.09

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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.