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Finding the Fourth Proportional to 393,639.86, 543,023.86 and 230,189.49

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Solution

The fourth proportional to 393,639.86, 543,023.86 and 230,189.49 is: 317,545.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,639.86 : 543,023.86 = 230,189.49 : x
  2. Step 2: Convert to fraction form
    393,639.86/543,023.86 = 230,189.49/x
  3. Step 3: Cross multiply
    393,639.86x = 543,023.86 × 230,189.49
  4. Step 4: Simplify right side
    393,639.86x = 124,998,385,391.23
  5. Step 5: Solve for x
    x = 124,998,385,391.23/393,639.86
  6. Step 6: Final answer
    x = 317,545.04

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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.