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Finding the Fourth Proportional to 564.57, 843.21 and 449.15

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Solution

The fourth proportional to 564.57, 843.21 and 449.15 is: 670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.57 : 843.21 = 449.15 : x
  2. Step 2: Convert to fraction form
    564.57/843.21 = 449.15/x
  3. Step 3: Cross multiply
    564.57x = 843.21 × 449.15
  4. Step 4: Simplify right side
    564.57x = 378,723.56
  5. Step 5: Solve for x
    x = 378,723.56/564.57
  6. Step 6: Final answer
    x = 670.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.