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Finding the Fourth Proportional to 863.17, 1,190.67 and 626.85

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Solution

The fourth proportional to 863.17, 1,190.67 and 626.85 is: 864.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.17 : 1,190.67 = 626.85 : x
  2. Step 2: Convert to fraction form
    863.17/1,190.67 = 626.85/x
  3. Step 3: Cross multiply
    863.17x = 1,190.67 × 626.85
  4. Step 4: Simplify right side
    863.17x = 746,371.49
  5. Step 5: Solve for x
    x = 746,371.49/863.17
  6. Step 6: Final answer
    x = 864.69

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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.