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Finding the Fourth Proportional to 663.12, 994.32 and 338.16

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Solution

The fourth proportional to 663.12, 994.32 and 338.16 is: 507.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.12 : 994.32 = 338.16 : x
  2. Step 2: Convert to fraction form
    663.12/994.32 = 338.16/x
  3. Step 3: Cross multiply
    663.12x = 994.32 × 338.16
  4. Step 4: Simplify right side
    663.12x = 336,239.25
  5. Step 5: Solve for x
    x = 336,239.25/663.12
  6. Step 6: Final answer
    x = 507.06

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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.