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Finding the Fourth Proportional to 608.68, 912.96 and 331.12

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Solution

The fourth proportional to 608.68, 912.96 and 331.12 is: 496.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.68 : 912.96 = 331.12 : x
  2. Step 2: Convert to fraction form
    608.68/912.96 = 331.12/x
  3. Step 3: Cross multiply
    608.68x = 912.96 × 331.12
  4. Step 4: Simplify right side
    608.68x = 302,299.32
  5. Step 5: Solve for x
    x = 302,299.32/608.68
  6. Step 6: Final answer
    x = 496.65

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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.