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Finding the Fourth Proportional to 289.26, 433.71 and 161.10

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Solution

The fourth proportional to 289.26, 433.71 and 161.10 is: 241.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.26 : 433.71 = 161.10 : x
  2. Step 2: Convert to fraction form
    289.26/433.71 = 161.10/x
  3. Step 3: Cross multiply
    289.26x = 433.71 × 161.10
  4. Step 4: Simplify right side
    289.26x = 69,870.68
  5. Step 5: Solve for x
    x = 69,870.68/289.26
  6. Step 6: Final answer
    x = 241.55

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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.