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Finding the Fourth Proportional to 259,408.64, 389,124.88 and 79,481.18

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Solution

The fourth proportional to 259,408.64, 389,124.88 and 79,481.18 is: 119,225.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,408.64 : 389,124.88 = 79,481.18 : x
  2. Step 2: Convert to fraction form
    259,408.64/389,124.88 = 79,481.18/x
  3. Step 3: Cross multiply
    259,408.64x = 389,124.88 × 79,481.18
  4. Step 4: Simplify right side
    259,408.64x = 30,928,104,629.76
  5. Step 5: Solve for x
    x = 30,928,104,629.76/259,408.64
  6. Step 6: Final answer
    x = 119,225.42

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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.