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Finding the Fourth Proportional to 638,612.31, 957,922.26 and 189,337.11

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Solution

The fourth proportional to 638,612.31, 957,922.26 and 189,337.11 is: 284,006.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,612.31 : 957,922.26 = 189,337.11 : x
  2. Step 2: Convert to fraction form
    638,612.31/957,922.26 = 189,337.11/x
  3. Step 3: Cross multiply
    638,612.31x = 957,922.26 × 189,337.11
  4. Step 4: Simplify right side
    638,612.31x = 181,370,232,313.07
  5. Step 5: Solve for x
    x = 181,370,232,313.07/638,612.31
  6. Step 6: Final answer
    x = 284,006.79

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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.