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Finding the Fourth Proportional to 663.57, 994.74 and 338.22

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Solution

The fourth proportional to 663.57, 994.74 and 338.22 is: 507.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.57 : 994.74 = 338.22 : x
  2. Step 2: Convert to fraction form
    663.57/994.74 = 338.22/x
  3. Step 3: Cross multiply
    663.57x = 994.74 × 338.22
  4. Step 4: Simplify right side
    663.57x = 336,440.96
  5. Step 5: Solve for x
    x = 336,440.96/663.57
  6. Step 6: Final answer
    x = 507.02

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.