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Finding the Fourth Proportional to 638.28, 950.94 and 612.36

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Solution

The fourth proportional to 638.28, 950.94 and 612.36 is: 912.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.28 : 950.94 = 612.36 : x
  2. Step 2: Convert to fraction form
    638.28/950.94 = 612.36/x
  3. Step 3: Cross multiply
    638.28x = 950.94 × 612.36
  4. Step 4: Simplify right side
    638.28x = 582,317.62
  5. Step 5: Solve for x
    x = 582,317.62/638.28
  6. Step 6: Final answer
    x = 912.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.