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Finding the Fourth Proportional to 259,747.80, 389,621.70 and 171,101.40

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Solution

The fourth proportional to 259,747.80, 389,621.70 and 171,101.40 is: 256,652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,747.80 : 389,621.70 = 171,101.40 : x
  2. Step 2: Convert to fraction form
    259,747.80/389,621.70 = 171,101.40/x
  3. Step 3: Cross multiply
    259,747.80x = 389,621.70 × 171,101.40
  4. Step 4: Simplify right side
    259,747.80x = 66,664,818,340.38
  5. Step 5: Solve for x
    x = 66,664,818,340.38/259,747.80
  6. Step 6: Final answer
    x = 256,652.10

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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.