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Finding the Fourth Proportional to 206.21, 309.32 and 151.94

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Solution

The fourth proportional to 206.21, 309.32 and 151.94 is: 227.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.21 : 309.32 = 151.94 : x
  2. Step 2: Convert to fraction form
    206.21/309.32 = 151.94/x
  3. Step 3: Cross multiply
    206.21x = 309.32 × 151.94
  4. Step 4: Simplify right side
    206.21x = 46,998.08
  5. Step 5: Solve for x
    x = 46,998.08/206.21
  6. Step 6: Final answer
    x = 227.91

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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.