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Finding the Fourth Proportional to 678,785.77, 936,513.66 and 392,201.29

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Solution

The fourth proportional to 678,785.77, 936,513.66 and 392,201.29 is: 541,116.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,785.77 : 936,513.66 = 392,201.29 : x
  2. Step 2: Convert to fraction form
    678,785.77/936,513.66 = 392,201.29/x
  3. Step 3: Cross multiply
    678,785.77x = 936,513.66 × 392,201.29
  4. Step 4: Simplify right side
    678,785.77x = 367,301,865,554.62
  5. Step 5: Solve for x
    x = 367,301,865,554.62/678,785.77
  6. Step 6: Final answer
    x = 541,116.04

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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.