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Finding the Fourth Proportional to 259,793.20, 389,689.80 and 171,146.80

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Solution

The fourth proportional to 259,793.20, 389,689.80 and 171,146.80 is: 256,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,793.20 : 389,689.80 = 171,146.80 : x
  2. Step 2: Convert to fraction form
    259,793.20/389,689.80 = 171,146.80/x
  3. Step 3: Cross multiply
    259,793.20x = 389,689.80 × 171,146.80
  4. Step 4: Simplify right side
    259,793.20x = 66,694,162,262.64
  5. Step 5: Solve for x
    x = 66,694,162,262.64/259,793.20
  6. Step 6: Final answer
    x = 256,720.20

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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.