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Finding the Fourth Proportional to 626.12, 863.69 and 415.99

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Solution

The fourth proportional to 626.12, 863.69 and 415.99 is: 573.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 863.69 = 415.99 : x
  2. Step 2: Convert to fraction form
    626.12/863.69 = 415.99/x
  3. Step 3: Cross multiply
    626.12x = 863.69 × 415.99
  4. Step 4: Simplify right side
    626.12x = 359,286.40
  5. Step 5: Solve for x
    x = 359,286.40/626.12
  6. Step 6: Final answer
    x = 573.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.