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Finding the Fourth Proportional to 211.87, 317.11 and 150.82

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Solution

The fourth proportional to 211.87, 317.11 and 150.82 is: 225.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.87 : 317.11 = 150.82 : x
  2. Step 2: Convert to fraction form
    211.87/317.11 = 150.82/x
  3. Step 3: Cross multiply
    211.87x = 317.11 × 150.82
  4. Step 4: Simplify right side
    211.87x = 47,826.53
  5. Step 5: Solve for x
    x = 47,826.53/211.87
  6. Step 6: Final answer
    x = 225.74

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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.