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Finding the Fourth Proportional to 863.31, 1,295.03 and 761.31

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Solution

The fourth proportional to 863.31, 1,295.03 and 761.31 is: 1,142.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.31 : 1,295.03 = 761.31 : x
  2. Step 2: Convert to fraction form
    863.31/1,295.03 = 761.31/x
  3. Step 3: Cross multiply
    863.31x = 1,295.03 × 761.31
  4. Step 4: Simplify right side
    863.31x = 985,915.48
  5. Step 5: Solve for x
    x = 985,915.48/863.31
  6. Step 6: Final answer
    x = 1,142.02

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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.