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Finding the Fourth Proportional to 626.77, 939.65 and 261.83

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Solution

The fourth proportional to 626.77, 939.65 and 261.83 is: 392.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.77 : 939.65 = 261.83 : x
  2. Step 2: Convert to fraction form
    626.77/939.65 = 261.83/x
  3. Step 3: Cross multiply
    626.77x = 939.65 × 261.83
  4. Step 4: Simplify right side
    626.77x = 246,028.56
  5. Step 5: Solve for x
    x = 246,028.56/626.77
  6. Step 6: Final answer
    x = 392.53

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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.