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Finding the Fourth Proportional to 289,648.56, 399,296.16 and 203,344.76

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Solution

The fourth proportional to 289,648.56, 399,296.16 and 203,344.76 is: 280,321.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,648.56 : 399,296.16 = 203,344.76 : x
  2. Step 2: Convert to fraction form
    289,648.56/399,296.16 = 203,344.76/x
  3. Step 3: Cross multiply
    289,648.56x = 399,296.16 × 203,344.76
  4. Step 4: Simplify right side
    289,648.56x = 81,194,781,824.12
  5. Step 5: Solve for x
    x = 81,194,781,824.12/289,648.56
  6. Step 6: Final answer
    x = 280,321.72

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1.5x scale

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.