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Finding the Fourth Proportional to 621,696.27, 857,864.74 and 392,167.38

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Solution

The fourth proportional to 621,696.27, 857,864.74 and 392,167.38 is: 541,142.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,696.27 : 857,864.74 = 392,167.38 : x
  2. Step 2: Convert to fraction form
    621,696.27/857,864.74 = 392,167.38/x
  3. Step 3: Cross multiply
    621,696.27x = 857,864.74 × 392,167.38
  4. Step 4: Simplify right side
    621,696.27x = 336,426,567,480.18
  5. Step 5: Solve for x
    x = 336,426,567,480.18/621,696.27
  6. Step 6: Final answer
    x = 541,142.97

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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.