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Finding the Fourth Proportional to 259,408.14, 389,124.13 and 79,480.68

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Solution

The fourth proportional to 259,408.14, 389,124.13 and 79,480.68 is: 119,224.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,408.14 : 389,124.13 = 79,480.68 : x
  2. Step 2: Convert to fraction form
    259,408.14/389,124.13 = 79,480.68/x
  3. Step 3: Cross multiply
    259,408.14x = 389,124.13 × 79,480.68
  4. Step 4: Simplify right side
    259,408.14x = 30,927,850,456.81
  5. Step 5: Solve for x
    x = 30,927,850,456.81/259,408.14
  6. Step 6: Final answer
    x = 119,224.67

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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.