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Finding the Fourth Proportional to 344.10, 515.04 and 221.92

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Solution

The fourth proportional to 344.10, 515.04 and 221.92 is: 332.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.10 : 515.04 = 221.92 : x
  2. Step 2: Convert to fraction form
    344.10/515.04 = 221.92/x
  3. Step 3: Cross multiply
    344.10x = 515.04 × 221.92
  4. Step 4: Simplify right side
    344.10x = 114,297.68
  5. Step 5: Solve for x
    x = 114,297.68/344.10
  6. Step 6: Final answer
    x = 332.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.