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Finding the Fourth Proportional to 634.92, 879.90 and 626.12

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Solution

The fourth proportional to 634.92, 879.90 and 626.12 is: 867.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.92 : 879.90 = 626.12 : x
  2. Step 2: Convert to fraction form
    634.92/879.90 = 626.12/x
  3. Step 3: Cross multiply
    634.92x = 879.90 × 626.12
  4. Step 4: Simplify right side
    634.92x = 550,922.99
  5. Step 5: Solve for x
    x = 550,922.99/634.92
  6. Step 6: Final answer
    x = 867.70

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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.