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Finding the Fourth Proportional to 259,625.70, 389,438.55 and 170,979.30

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Solution

The fourth proportional to 259,625.70, 389,438.55 and 170,979.30 is: 256,468.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,625.70 : 389,438.55 = 170,979.30 : x
  2. Step 2: Convert to fraction form
    259,625.70/389,438.55 = 170,979.30/x
  3. Step 3: Cross multiply
    259,625.70x = 389,438.55 × 170,979.30
  4. Step 4: Simplify right side
    259,625.70x = 66,585,930,672.02
  5. Step 5: Solve for x
    x = 66,585,930,672.02/259,625.70
  6. Step 6: Final answer
    x = 256,468.95

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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.