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Finding the Fourth Proportional to 361.48, 498.99 and 221.62

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Solution

The fourth proportional to 361.48, 498.99 and 221.62 is: 305.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.48 : 498.99 = 221.62 : x
  2. Step 2: Convert to fraction form
    361.48/498.99 = 221.62/x
  3. Step 3: Cross multiply
    361.48x = 498.99 × 221.62
  4. Step 4: Simplify right side
    361.48x = 110,586.16
  5. Step 5: Solve for x
    x = 110,586.16/361.48
  6. Step 6: Final answer
    x = 305.93

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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.