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Finding the Fourth Proportional to 939.82, 1,297.24 and 608.27

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Solution

The fourth proportional to 939.82, 1,297.24 and 608.27 is: 839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.82 : 1,297.24 = 608.27 : x
  2. Step 2: Convert to fraction form
    939.82/1,297.24 = 608.27/x
  3. Step 3: Cross multiply
    939.82x = 1,297.24 × 608.27
  4. Step 4: Simplify right side
    939.82x = 789,073.90
  5. Step 5: Solve for x
    x = 789,073.90/939.82
  6. Step 6: Final answer
    x = 839.60

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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.