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Finding the Fourth Proportional to 393,527.61, 543,065.57 and 223,761.72

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Solution

The fourth proportional to 393,527.61, 543,065.57 and 223,761.72 is: 308,789.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,527.61 : 543,065.57 = 223,761.72 : x
  2. Step 2: Convert to fraction form
    393,527.61/543,065.57 = 223,761.72/x
  3. Step 3: Cross multiply
    393,527.61x = 543,065.57 × 223,761.72
  4. Step 4: Simplify right side
    393,527.61x = 121,517,284,897.17
  5. Step 5: Solve for x
    x = 121,517,284,897.17/393,527.61
  6. Step 6: Final answer
    x = 308,789.73

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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.