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Finding the Fourth Proportional to 863.38, 1,191.72 and 527.41

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Solution

The fourth proportional to 863.38, 1,191.72 and 527.41 is: 727.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.38 : 1,191.72 = 527.41 : x
  2. Step 2: Convert to fraction form
    863.38/1,191.72 = 527.41/x
  3. Step 3: Cross multiply
    863.38x = 1,191.72 × 527.41
  4. Step 4: Simplify right side
    863.38x = 628,525.05
  5. Step 5: Solve for x
    x = 628,525.05/863.38
  6. Step 6: Final answer
    x = 727.98

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Double scale
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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.