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Finding the Fourth Proportional to 626.79, 940.41 and 318.33

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Solution

The fourth proportional to 626.79, 940.41 and 318.33 is: 477.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.79 : 940.41 = 318.33 : x
  2. Step 2: Convert to fraction form
    626.79/940.41 = 318.33/x
  3. Step 3: Cross multiply
    626.79x = 940.41 × 318.33
  4. Step 4: Simplify right side
    626.79x = 299,360.72
  5. Step 5: Solve for x
    x = 299,360.72/626.79
  6. Step 6: Final answer
    x = 477.61

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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.