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Finding the Fourth Proportional to 638,612.30, 958,103.44 and 189,341.75

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Solution

The fourth proportional to 638,612.30, 958,103.44 and 189,341.75 is: 284,067.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,612.30 : 958,103.44 = 189,341.75 : x
  2. Step 2: Convert to fraction form
    638,612.30/958,103.44 = 189,341.75/x
  3. Step 3: Cross multiply
    638,612.30x = 958,103.44 × 189,341.75
  4. Step 4: Simplify right side
    638,612.30x = 181,408,983,932.52
  5. Step 5: Solve for x
    x = 181,408,983,932.52/638,612.30
  6. Step 6: Final answer
    x = 284,067.47

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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.