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Finding the Fourth Proportional to 285,392.57, 393,844.62 and 172,193.45

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Solution

The fourth proportional to 285,392.57, 393,844.62 and 172,193.45 is: 237,628.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,392.57 : 393,844.62 = 172,193.45 : x
  2. Step 2: Convert to fraction form
    285,392.57/393,844.62 = 172,193.45/x
  3. Step 3: Cross multiply
    285,392.57x = 393,844.62 × 172,193.45
  4. Step 4: Simplify right side
    285,392.57x = 67,817,461,912.52
  5. Step 5: Solve for x
    x = 67,817,461,912.52/285,392.57
  6. Step 6: Final answer
    x = 237,628.69

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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.