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Finding the Fourth Proportional to 274.16, 412.18 and 220.43

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Solution

The fourth proportional to 274.16, 412.18 and 220.43 is: 331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.16 : 412.18 = 220.43 : x
  2. Step 2: Convert to fraction form
    274.16/412.18 = 220.43/x
  3. Step 3: Cross multiply
    274.16x = 412.18 × 220.43
  4. Step 4: Simplify right side
    274.16x = 90,854.78
  5. Step 5: Solve for x
    x = 90,854.78/274.16
  6. Step 6: Final answer
    x = 331.40

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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.