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Finding the Fourth Proportional to 896.67, 1,344.45 and 311.53

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Solution

The fourth proportional to 896.67, 1,344.45 and 311.53 is: 467.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.67 : 1,344.45 = 311.53 : x
  2. Step 2: Convert to fraction form
    896.67/1,344.45 = 311.53/x
  3. Step 3: Cross multiply
    896.67x = 1,344.45 × 311.53
  4. Step 4: Simplify right side
    896.67x = 418,836.51
  5. Step 5: Solve for x
    x = 418,836.51/896.67
  6. Step 6: Final answer
    x = 467.10

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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.