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Finding the Fourth Proportional to 231,939.20, 347,908.80 and 65,728.64

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Solution

The fourth proportional to 231,939.20, 347,908.80 and 65,728.64 is: 98,592.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,939.20 : 347,908.80 = 65,728.64 : x
  2. Step 2: Convert to fraction form
    231,939.20/347,908.80 = 65,728.64/x
  3. Step 3: Cross multiply
    231,939.20x = 347,908.80 × 65,728.64
  4. Step 4: Simplify right side
    231,939.20x = 22,867,572,268.03
  5. Step 5: Solve for x
    x = 22,867,572,268.03/231,939.20
  6. Step 6: Final answer
    x = 98,592.96

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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.