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Finding the Fourth Proportional to 626.77, 940.49 and 261.81

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Solution

The fourth proportional to 626.77, 940.49 and 261.81 is: 392.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.77 : 940.49 = 261.81 : x
  2. Step 2: Convert to fraction form
    626.77/940.49 = 261.81/x
  3. Step 3: Cross multiply
    626.77x = 940.49 × 261.81
  4. Step 4: Simplify right side
    626.77x = 246,223.68
  5. Step 5: Solve for x
    x = 246,223.68/626.77
  6. Step 6: Final answer
    x = 392.85

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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.