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Finding the Fourth Proportional to 626.24, 939.20 and 261.03

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Solution

The fourth proportional to 626.24, 939.20 and 261.03 is: 391.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.24 : 939.20 = 261.03 : x
  2. Step 2: Convert to fraction form
    626.24/939.20 = 261.03/x
  3. Step 3: Cross multiply
    626.24x = 939.20 × 261.03
  4. Step 4: Simplify right side
    626.24x = 245,160.03
  5. Step 5: Solve for x
    x = 245,160.03/626.24
  6. Step 6: Final answer
    x = 391.48

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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.