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Finding the Fourth Proportional to 863.88, 1,296.18 and 622.32

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Solution

The fourth proportional to 863.88, 1,296.18 and 622.32 is: 933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.88 : 1,296.18 = 622.32 : x
  2. Step 2: Convert to fraction form
    863.88/1,296.18 = 622.32/x
  3. Step 3: Cross multiply
    863.88x = 1,296.18 × 622.32
  4. Step 4: Simplify right side
    863.88x = 806,638.74
  5. Step 5: Solve for x
    x = 806,638.74/863.88
  6. Step 6: Final answer
    x = 933.74

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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.