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Finding the Fourth Proportional to 863.93, 1,191.13 and 627.69

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Solution

The fourth proportional to 863.93, 1,191.13 and 627.69 is: 865.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.93 : 1,191.13 = 627.69 : x
  2. Step 2: Convert to fraction form
    863.93/1,191.13 = 627.69/x
  3. Step 3: Cross multiply
    863.93x = 1,191.13 × 627.69
  4. Step 4: Simplify right side
    863.93x = 747,658.82
  5. Step 5: Solve for x
    x = 747,658.82/863.93
  6. Step 6: Final answer
    x = 865.41

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.