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Finding the Fourth Proportional to 896.46, 1,344.75 and 311.43

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Solution

The fourth proportional to 896.46, 1,344.75 and 311.43 is: 467.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.46 : 1,344.75 = 311.43 : x
  2. Step 2: Convert to fraction form
    896.46/1,344.75 = 311.43/x
  3. Step 3: Cross multiply
    896.46x = 1,344.75 × 311.43
  4. Step 4: Simplify right side
    896.46x = 418,795.49
  5. Step 5: Solve for x
    x = 418,795.49/896.46
  6. Step 6: Final answer
    x = 467.17

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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.