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Finding the Fourth Proportional to 626.52, 940.20 and 261.31

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Solution

The fourth proportional to 626.52, 940.20 and 261.31 is: 392.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.52 : 940.20 = 261.31 : x
  2. Step 2: Convert to fraction form
    626.52/940.20 = 261.31/x
  3. Step 3: Cross multiply
    626.52x = 940.20 × 261.31
  4. Step 4: Simplify right side
    626.52x = 245,683.66
  5. Step 5: Solve for x
    x = 245,683.66/626.52
  6. Step 6: Final answer
    x = 392.14

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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.