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Finding the Fourth Proportional to 285,391.81, 393,843.59 and 172,192.69

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Solution

The fourth proportional to 285,391.81, 393,843.59 and 172,192.69 is: 237,627.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,391.81 : 393,843.59 = 172,192.69 : x
  2. Step 2: Convert to fraction form
    285,391.81/393,843.59 = 172,192.69/x
  3. Step 3: Cross multiply
    285,391.81x = 393,843.59 × 172,192.69
  4. Step 4: Simplify right side
    285,391.81x = 67,816,986,647.23
  5. Step 5: Solve for x
    x = 67,816,986,647.23/285,391.81
  6. Step 6: Final answer
    x = 237,627.66

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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.