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Finding the Fourth Proportional to 265,517.80, 398,276.70 and 171,039.40

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Solution

The fourth proportional to 265,517.80, 398,276.70 and 171,039.40 is: 256,559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,517.80 : 398,276.70 = 171,039.40 : x
  2. Step 2: Convert to fraction form
    265,517.80/398,276.70 = 171,039.40/x
  3. Step 3: Cross multiply
    265,517.80x = 398,276.70 × 171,039.40
  4. Step 4: Simplify right side
    265,517.80x = 68,121,007,801.98
  5. Step 5: Solve for x
    x = 68,121,007,801.98/265,517.80
  6. Step 6: Final answer
    x = 256,559.10

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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.