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Finding the Fourth Proportional to 285,512.31, 394,006.68 and 156,453.93

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Solution

The fourth proportional to 285,512.31, 394,006.68 and 156,453.93 is: 215,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,512.31 : 394,006.68 = 156,453.93 : x
  2. Step 2: Convert to fraction form
    285,512.31/394,006.68 = 156,453.93/x
  3. Step 3: Cross multiply
    285,512.31x = 394,006.68 × 156,453.93
  4. Step 4: Simplify right side
    285,512.31x = 61,643,893,532.25
  5. Step 5: Solve for x
    x = 61,643,893,532.25/285,512.31
  6. Step 6: Final answer
    x = 215,906.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.