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Finding the Fourth Proportional to 638,672.67, 958,193.91 and 189,404.34

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Solution

The fourth proportional to 638,672.67, 958,193.91 and 189,404.34 is: 284,161.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,672.67 : 958,193.91 = 189,404.34 : x
  2. Step 2: Convert to fraction form
    638,672.67/958,193.91 = 189,404.34/x
  3. Step 3: Cross multiply
    638,672.67x = 958,193.91 × 189,404.34
  4. Step 4: Simplify right side
    638,672.67x = 181,486,085,115.57
  5. Step 5: Solve for x
    x = 181,486,085,115.57/638,672.67
  6. Step 6: Final answer
    x = 284,161.35

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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.