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Finding the Fourth Proportional to 259,408.27, 389,124.33 and 79,480.81

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Solution

The fourth proportional to 259,408.27, 389,124.33 and 79,480.81 is: 119,224.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,408.27 : 389,124.33 = 79,480.81 : x
  2. Step 2: Convert to fraction form
    259,408.27/389,124.33 = 79,480.81/x
  3. Step 3: Cross multiply
    259,408.27x = 389,124.33 × 79,480.81
  4. Step 4: Simplify right side
    259,408.27x = 30,927,914,596.08
  5. Step 5: Solve for x
    x = 30,927,914,596.08/259,408.27
  6. Step 6: Final answer
    x = 119,224.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.