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Finding the Fourth Proportional to 479,645.61, 661,912.37 and 261,854.63

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Solution

The fourth proportional to 479,645.61, 661,912.37 and 261,854.63 is: 361,360.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,645.61 : 661,912.37 = 261,854.63 : x
  2. Step 2: Convert to fraction form
    479,645.61/661,912.37 = 261,854.63/x
  3. Step 3: Cross multiply
    479,645.61x = 661,912.37 × 261,854.63
  4. Step 4: Simplify right side
    479,645.61x = 173,324,814,119.94
  5. Step 5: Solve for x
    x = 173,324,814,119.94/479,645.61
  6. Step 6: Final answer
    x = 361,360.16

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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.