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Finding the Fourth Proportional to 259,515.56, 389,329.76 and 79,601.70

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Solution

The fourth proportional to 259,515.56, 389,329.76 and 79,601.70 is: 119,419.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,515.56 : 389,329.76 = 79,601.70 : x
  2. Step 2: Convert to fraction form
    259,515.56/389,329.76 = 79,601.70/x
  3. Step 3: Cross multiply
    259,515.56x = 389,329.76 × 79,601.70
  4. Step 4: Simplify right side
    259,515.56x = 30,991,310,955.60
  5. Step 5: Solve for x
    x = 30,991,310,955.60/259,515.56
  6. Step 6: Final answer
    x = 119,419.86

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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.