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Finding the Fourth Proportional to 361.16, 498.06 and 221.30

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Solution

The fourth proportional to 361.16, 498.06 and 221.30 is: 305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.16 : 498.06 = 221.30 : x
  2. Step 2: Convert to fraction form
    361.16/498.06 = 221.30/x
  3. Step 3: Cross multiply
    361.16x = 498.06 × 221.30
  4. Step 4: Simplify right side
    361.16x = 110,220.68
  5. Step 5: Solve for x
    x = 110,220.68/361.16
  6. Step 6: Final answer
    x = 305.19

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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.