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Finding the Fourth Proportional to 289.36, 433.26 and 220.56

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Solution

The fourth proportional to 289.36, 433.26 and 220.56 is: 330.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.36 : 433.26 = 220.56 : x
  2. Step 2: Convert to fraction form
    289.36/433.26 = 220.56/x
  3. Step 3: Cross multiply
    289.36x = 433.26 × 220.56
  4. Step 4: Simplify right side
    289.36x = 95,557.66
  5. Step 5: Solve for x
    x = 95,557.66/289.36
  6. Step 6: Final answer
    x = 330.24

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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.