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Finding the Fourth Proportional to 626.93, 939.72 and 261.49

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Solution

The fourth proportional to 626.93, 939.72 and 261.49 is: 391.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.93 : 939.72 = 261.49 : x
  2. Step 2: Convert to fraction form
    626.93/939.72 = 261.49/x
  3. Step 3: Cross multiply
    626.93x = 939.72 × 261.49
  4. Step 4: Simplify right side
    626.93x = 245,727.38
  5. Step 5: Solve for x
    x = 245,727.38/626.93
  6. Step 6: Final answer
    x = 391.95

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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.