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Finding the Fourth Proportional to 447.63, 671.35 and 317.26

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Solution

The fourth proportional to 447.63, 671.35 and 317.26 is: 475.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.63 : 671.35 = 317.26 : x
  2. Step 2: Convert to fraction form
    447.63/671.35 = 317.26/x
  3. Step 3: Cross multiply
    447.63x = 671.35 × 317.26
  4. Step 4: Simplify right side
    447.63x = 212,995.03
  5. Step 5: Solve for x
    x = 212,995.03/447.63
  6. Step 6: Final answer
    x = 475.83

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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.