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Finding the Fourth Proportional to 361.91, 499.30 and 251.66

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Solution

The fourth proportional to 361.91, 499.30 and 251.66 is: 347.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.91 : 499.30 = 251.66 : x
  2. Step 2: Convert to fraction form
    361.91/499.30 = 251.66/x
  3. Step 3: Cross multiply
    361.91x = 499.30 × 251.66
  4. Step 4: Simplify right side
    361.91x = 125,654.46
  5. Step 5: Solve for x
    x = 125,654.46/361.91
  6. Step 6: Final answer
    x = 347.20

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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.