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Finding the Fourth Proportional to 285,388.33, 393,838.78 and 172,189.21

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Solution

The fourth proportional to 285,388.33, 393,838.78 and 172,189.21 is: 237,622.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,388.33 : 393,838.78 = 172,189.21 : x
  2. Step 2: Convert to fraction form
    285,388.33/393,838.78 = 172,189.21/x
  3. Step 3: Cross multiply
    285,388.33x = 393,838.78 × 172,189.21
  4. Step 4: Simplify right side
    285,388.33x = 67,814,786,426.37
  5. Step 5: Solve for x
    x = 67,814,786,426.37/285,388.33
  6. Step 6: Final answer
    x = 237,622.85

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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.