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Finding the Fourth Proportional to 626.90, 940.19 and 261.69

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Solution

The fourth proportional to 626.90, 940.19 and 261.69 is: 392.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.90 : 940.19 = 261.69 : x
  2. Step 2: Convert to fraction form
    626.90/940.19 = 261.69/x
  3. Step 3: Cross multiply
    626.90x = 940.19 × 261.69
  4. Step 4: Simplify right side
    626.90x = 246,037.01
  5. Step 5: Solve for x
    x = 246,037.01/626.90
  6. Step 6: Final answer
    x = 392.47

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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.