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Finding the Fourth Proportional to 863.62, 1,295.50 and 762.10

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Solution

The fourth proportional to 863.62, 1,295.50 and 762.10 is: 1,143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.62 : 1,295.50 = 762.10 : x
  2. Step 2: Convert to fraction form
    863.62/1,295.50 = 762.10/x
  3. Step 3: Cross multiply
    863.62x = 1,295.50 × 762.10
  4. Step 4: Simplify right side
    863.62x = 987,300.55
  5. Step 5: Solve for x
    x = 987,300.55/863.62
  6. Step 6: Final answer
    x = 1,143.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.