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Finding the Fourth Proportional to 479,649.62, 661,917.90 and 261,858.64

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Solution

The fourth proportional to 479,649.62, 661,917.90 and 261,858.64 is: 361,365.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,649.62 : 661,917.90 = 261,858.64 : x
  2. Step 2: Convert to fraction form
    479,649.62/661,917.90 = 261,858.64/x
  3. Step 3: Cross multiply
    479,649.62x = 661,917.90 × 261,858.64
  4. Step 4: Simplify right side
    479,649.62x = 173,328,921,085.66
  5. Step 5: Solve for x
    x = 173,328,921,085.66/479,649.62
  6. Step 6: Final answer
    x = 361,365.70

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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.