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Finding the Fourth Proportional to 259,769.40, 389,945.70 and 200,866.20

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Solution

The fourth proportional to 259,769.40, 389,945.70 and 200,866.20 is: 301,524.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,769.40 : 389,945.70 = 200,866.20 : x
  2. Step 2: Convert to fraction form
    259,769.40/389,945.70 = 200,866.20/x
  3. Step 3: Cross multiply
    259,769.40x = 389,945.70 × 200,866.20
  4. Step 4: Simplify right side
    259,769.40x = 78,326,910,965.34
  5. Step 5: Solve for x
    x = 78,326,910,965.34/259,769.40
  6. Step 6: Final answer
    x = 301,524.78

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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.