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Finding the Fourth Proportional to 626.91, 856.38 and 622.86

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Solution

The fourth proportional to 626.91, 856.38 and 622.86 is: 850.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.91 : 856.38 = 622.86 : x
  2. Step 2: Convert to fraction form
    626.91/856.38 = 622.86/x
  3. Step 3: Cross multiply
    626.91x = 856.38 × 622.86
  4. Step 4: Simplify right side
    626.91x = 533,404.85
  5. Step 5: Solve for x
    x = 533,404.85/626.91
  6. Step 6: Final answer
    x = 850.85

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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.