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Finding the Fourth Proportional to 617.42, 926.17 and 206.56

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Solution

The fourth proportional to 617.42, 926.17 and 206.56 is: 309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.42 : 926.17 = 206.56 : x
  2. Step 2: Convert to fraction form
    617.42/926.17 = 206.56/x
  3. Step 3: Cross multiply
    617.42x = 926.17 × 206.56
  4. Step 4: Simplify right side
    617.42x = 191,309.68
  5. Step 5: Solve for x
    x = 191,309.68/617.42
  6. Step 6: Final answer
    x = 309.85

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Similar ratio
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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.