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Finding the Fourth Proportional to 317.21, 475.29 and 225.77

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Solution

The fourth proportional to 317.21, 475.29 and 225.77 is: 338.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.21 : 475.29 = 225.77 : x
  2. Step 2: Convert to fraction form
    317.21/475.29 = 225.77/x
  3. Step 3: Cross multiply
    317.21x = 475.29 × 225.77
  4. Step 4: Simplify right side
    317.21x = 107,303.85
  5. Step 5: Solve for x
    x = 107,303.85/317.21
  6. Step 6: Final answer
    x = 338.28

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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.