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Finding the Fourth Proportional to 337.14, 505.40 and 221.40

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Solution

The fourth proportional to 337.14, 505.40 and 221.40 is: 331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    337.14 : 505.40 = 221.40 : x
  2. Step 2: Convert to fraction form
    337.14/505.40 = 221.40/x
  3. Step 3: Cross multiply
    337.14x = 505.40 × 221.40
  4. Step 4: Simplify right side
    337.14x = 111,895.56
  5. Step 5: Solve for x
    x = 111,895.56/337.14
  6. Step 6: Final answer
    x = 331.90

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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.