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Finding the Fourth Proportional to 284,019.40, 391,940.22 and 156,694.96

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Solution

The fourth proportional to 284,019.40, 391,940.22 and 156,694.96 is: 216,235.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,019.40 : 391,940.22 = 156,694.96 : x
  2. Step 2: Convert to fraction form
    284,019.40/391,940.22 = 156,694.96/x
  3. Step 3: Cross multiply
    284,019.40x = 391,940.22 × 156,694.96
  4. Step 4: Simplify right side
    284,019.40x = 61,415,057,095.29
  5. Step 5: Solve for x
    x = 61,415,057,095.29/284,019.40
  6. Step 6: Final answer
    x = 216,235.43

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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.