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Finding the Fourth Proportional to 361.91, 499.44 and 206.66

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Solution

The fourth proportional to 361.91, 499.44 and 206.66 is: 285.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.91 : 499.44 = 206.66 : x
  2. Step 2: Convert to fraction form
    361.91/499.44 = 206.66/x
  3. Step 3: Cross multiply
    361.91x = 499.44 × 206.66
  4. Step 4: Simplify right side
    361.91x = 103,210.74
  5. Step 5: Solve for x
    x = 103,210.74/361.91
  6. Step 6: Final answer
    x = 285.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.