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Finding the Fourth Proportional to 863.88, 1,185.66 and 798.12

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Solution

The fourth proportional to 863.88, 1,185.66 and 798.12 is: 1,095.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.88 : 1,185.66 = 798.12 : x
  2. Step 2: Convert to fraction form
    863.88/1,185.66 = 798.12/x
  3. Step 3: Cross multiply
    863.88x = 1,185.66 × 798.12
  4. Step 4: Simplify right side
    863.88x = 946,298.96
  5. Step 5: Solve for x
    x = 946,298.96/863.88
  6. Step 6: Final answer
    x = 1,095.41

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.