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Finding the Fourth Proportional to 259,568.80, 389,084.40 and 140,989.60

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Solution

The fourth proportional to 259,568.80, 389,084.40 and 140,989.60 is: 211,338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,568.80 : 389,084.40 = 140,989.60 : x
  2. Step 2: Convert to fraction form
    259,568.80/389,084.40 = 140,989.60/x
  3. Step 3: Cross multiply
    259,568.80x = 389,084.40 × 140,989.60
  4. Step 4: Simplify right side
    259,568.80x = 54,856,853,922.24
  5. Step 5: Solve for x
    x = 54,856,853,922.24/259,568.80
  6. Step 6: Final answer
    x = 211,338.40

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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.