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Finding the Fourth Proportional to 259,311.60, 388,189.80 and 154,076.40

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Solution

The fourth proportional to 259,311.60, 388,189.80 and 154,076.40 is: 230,652.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,311.60 : 388,189.80 = 154,076.40 : x
  2. Step 2: Convert to fraction form
    259,311.60/388,189.80 = 154,076.40/x
  3. Step 3: Cross multiply
    259,311.60x = 388,189.80 × 154,076.40
  4. Step 4: Simplify right side
    259,311.60x = 59,810,886,900.72
  5. Step 5: Solve for x
    x = 59,810,886,900.72/259,311.60
  6. Step 6: Final answer
    x = 230,652.57

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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.