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Finding the Fourth Proportional to 285,387.68, 393,837.90 and 172,188.56

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Solution

The fourth proportional to 285,387.68, 393,837.90 and 172,188.56 is: 237,621.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,387.68 : 393,837.90 = 172,188.56 : x
  2. Step 2: Convert to fraction form
    285,387.68/393,837.90 = 172,188.56/x
  3. Step 3: Cross multiply
    285,387.68x = 393,837.90 × 172,188.56
  4. Step 4: Simplify right side
    285,387.68x = 67,814,381,213.31
  5. Step 5: Solve for x
    x = 67,814,381,213.31/285,387.68
  6. Step 6: Final answer
    x = 237,621.96

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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.