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Finding the Fourth Proportional to 639,028.80, 958,679.28 and 189,750.96

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Solution

The fourth proportional to 639,028.80, 958,679.28 and 189,750.96 is: 284,666.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,028.80 : 958,679.28 = 189,750.96 : x
  2. Step 2: Convert to fraction form
    639,028.80/958,679.28 = 189,750.96/x
  3. Step 3: Cross multiply
    639,028.80x = 958,679.28 × 189,750.96
  4. Step 4: Simplify right side
    639,028.80x = 181,910,313,712.11
  5. Step 5: Solve for x
    x = 181,910,313,712.11/639,028.80
  6. Step 6: Final answer
    x = 284,666.85

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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.