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Finding the Fourth Proportional to 447.57, 665.67 and 438.35

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Solution

The fourth proportional to 447.57, 665.67 and 438.35 is: 651.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.57 : 665.67 = 438.35 : x
  2. Step 2: Convert to fraction form
    447.57/665.67 = 438.35/x
  3. Step 3: Cross multiply
    447.57x = 665.67 × 438.35
  4. Step 4: Simplify right side
    447.57x = 291,796.44
  5. Step 5: Solve for x
    x = 291,796.44/447.57
  6. Step 6: Final answer
    x = 651.96

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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.