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Finding the Fourth Proportional to 361.08, 498.35 and 221.27

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Solution

The fourth proportional to 361.08, 498.35 and 221.27 is: 305.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.08 : 498.35 = 221.27 : x
  2. Step 2: Convert to fraction form
    361.08/498.35 = 221.27/x
  3. Step 3: Cross multiply
    361.08x = 498.35 × 221.27
  4. Step 4: Simplify right side
    361.08x = 110,270.42
  5. Step 5: Solve for x
    x = 110,270.42/361.08
  6. Step 6: Final answer
    x = 305.39

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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.