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Finding the Fourth Proportional to 335.21, 502.81 and 220.38

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Solution

The fourth proportional to 335.21, 502.81 and 220.38 is: 330.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.21 : 502.81 = 220.38 : x
  2. Step 2: Convert to fraction form
    335.21/502.81 = 220.38/x
  3. Step 3: Cross multiply
    335.21x = 502.81 × 220.38
  4. Step 4: Simplify right side
    335.21x = 110,808.72
  5. Step 5: Solve for x
    x = 110,808.72/335.21
  6. Step 6: Final answer
    x = 330.57

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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.