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Finding the Fourth Proportional to 261,786.39, 392,679.57 and 84,311.34

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Solution

The fourth proportional to 261,786.39, 392,679.57 and 84,311.34 is: 126,467.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,786.39 : 392,679.57 = 84,311.34 : x
  2. Step 2: Convert to fraction form
    261,786.39/392,679.57 = 84,311.34/x
  3. Step 3: Cross multiply
    261,786.39x = 392,679.57 × 84,311.34
  4. Step 4: Simplify right side
    261,786.39x = 33,107,340,737.32
  5. Step 5: Solve for x
    x = 33,107,340,737.32/261,786.39
  6. Step 6: Final answer
    x = 126,467.01

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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.