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Finding the Fourth Proportional to 263,230.32, 394,898.76 and 85,689.66

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Solution

The fourth proportional to 263,230.32, 394,898.76 and 85,689.66 is: 128,551.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,230.32 : 394,898.76 = 85,689.66 : x
  2. Step 2: Convert to fraction form
    263,230.32/394,898.76 = 85,689.66/x
  3. Step 3: Cross multiply
    263,230.32x = 394,898.76 × 85,689.66
  4. Step 4: Simplify right side
    263,230.32x = 33,838,740,478.82
  5. Step 5: Solve for x
    x = 33,838,740,478.82/263,230.32
  6. Step 6: Final answer
    x = 128,551.83

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1.5x scale

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.