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Finding the Fourth Proportional to 259,715.70, 389,573.55 and 126,855.45

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Solution

The fourth proportional to 259,715.70, 389,573.55 and 126,855.45 is: 190,283.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,715.70 : 389,573.55 = 126,855.45 : x
  2. Step 2: Convert to fraction form
    259,715.70/389,573.55 = 126,855.45/x
  3. Step 3: Cross multiply
    259,715.70x = 389,573.55 × 126,855.45
  4. Step 4: Simplify right side
    259,715.70x = 49,419,527,993.35
  5. Step 5: Solve for x
    x = 49,419,527,993.35/259,715.70
  6. Step 6: Final answer
    x = 190,283.18

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1.5x scale

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.