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Finding the Fourth Proportional to 863.57, 1,188.70 and 752.85

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Solution

The fourth proportional to 863.57, 1,188.70 and 752.85 is: 1,036.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.57 : 1,188.70 = 752.85 : x
  2. Step 2: Convert to fraction form
    863.57/1,188.70 = 752.85/x
  3. Step 3: Cross multiply
    863.57x = 1,188.70 × 752.85
  4. Step 4: Simplify right side
    863.57x = 894,906.85
  5. Step 5: Solve for x
    x = 894,906.85/863.57
  6. Step 6: Final answer
    x = 1,036.29

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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.