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Finding the Fourth Proportional to 626.13, 939.19 and 163.90

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Solution

The fourth proportional to 626.13, 939.19 and 163.90 is: 245.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.13 : 939.19 = 163.90 : x
  2. Step 2: Convert to fraction form
    626.13/939.19 = 163.90/x
  3. Step 3: Cross multiply
    626.13x = 939.19 × 163.90
  4. Step 4: Simplify right side
    626.13x = 153,933.24
  5. Step 5: Solve for x
    x = 153,933.24/626.13
  6. Step 6: Final answer
    x = 245.85

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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.