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Finding the Fourth Proportional to 285,253.11, 393,649.31 and 156,199.73

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Solution

The fourth proportional to 285,253.11, 393,649.31 and 156,199.73 is: 215,555.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,253.11 : 393,649.31 = 156,199.73 : x
  2. Step 2: Convert to fraction form
    285,253.11/393,649.31 = 156,199.73/x
  3. Step 3: Cross multiply
    285,253.11x = 393,649.31 × 156,199.73
  4. Step 4: Simplify right side
    285,253.11x = 61,487,914,358.94
  5. Step 5: Solve for x
    x = 61,487,914,358.94/285,253.11
  6. Step 6: Final answer
    x = 215,555.63

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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.