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Finding the Fourth Proportional to 626.72, 939.60 and 490.05

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Solution

The fourth proportional to 626.72, 939.60 and 490.05 is: 734.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.72 : 939.60 = 490.05 : x
  2. Step 2: Convert to fraction form
    626.72/939.60 = 490.05/x
  3. Step 3: Cross multiply
    626.72x = 939.60 × 490.05
  4. Step 4: Simplify right side
    626.72x = 460,450.98
  5. Step 5: Solve for x
    x = 460,450.98/626.72
  6. Step 6: Final answer
    x = 734.71

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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.