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Finding the Fourth Proportional to 479,434.92, 661,624.05 and 261,645.31

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Solution

The fourth proportional to 479,434.92, 661,624.05 and 261,645.31 is: 361,072.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,434.92 : 661,624.05 = 261,645.31 : x
  2. Step 2: Convert to fraction form
    479,434.92/661,624.05 = 261,645.31/x
  3. Step 3: Cross multiply
    479,434.92x = 661,624.05 × 261,645.31
  4. Step 4: Simplify right side
    479,434.92x = 173,110,826,280.52
  5. Step 5: Solve for x
    x = 173,110,826,280.52/479,434.92
  6. Step 6: Final answer
    x = 361,072.63

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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.