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Finding the Fourth Proportional to 622.26, 863.28 and 616.86

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Solution

The fourth proportional to 622.26, 863.28 and 616.86 is: 855.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.26 : 863.28 = 616.86 : x
  2. Step 2: Convert to fraction form
    622.26/863.28 = 616.86/x
  3. Step 3: Cross multiply
    622.26x = 863.28 × 616.86
  4. Step 4: Simplify right side
    622.26x = 532,522.90
  5. Step 5: Solve for x
    x = 532,522.90/622.26
  6. Step 6: Final answer
    x = 855.79

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.