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Finding the Fourth Proportional to 386,347.28, 579,400.92 and 186,543.44

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Solution

The fourth proportional to 386,347.28, 579,400.92 and 186,543.44 is: 279,757.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,347.28 : 579,400.92 = 186,543.44 : x
  2. Step 2: Convert to fraction form
    386,347.28/579,400.92 = 186,543.44/x
  3. Step 3: Cross multiply
    386,347.28x = 579,400.92 × 186,543.44
  4. Step 4: Simplify right side
    386,347.28x = 108,083,440,755.97
  5. Step 5: Solve for x
    x = 108,083,440,755.97/386,347.28
  6. Step 6: Final answer
    x = 279,757.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.