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Finding the Fourth Proportional to 447.44, 671.98 and 285.16

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Solution

The fourth proportional to 447.44, 671.98 and 285.16 is: 428.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.44 : 671.98 = 285.16 : x
  2. Step 2: Convert to fraction form
    447.44/671.98 = 285.16/x
  3. Step 3: Cross multiply
    447.44x = 671.98 × 285.16
  4. Step 4: Simplify right side
    447.44x = 191,621.82
  5. Step 5: Solve for x
    x = 191,621.82/447.44
  6. Step 6: Final answer
    x = 428.26

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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.