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Finding the Fourth Proportional to 289.50, 434.25 and 161.25

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Solution

The fourth proportional to 289.50, 434.25 and 161.25 is: 241.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.50 : 434.25 = 161.25 : x
  2. Step 2: Convert to fraction form
    289.50/434.25 = 161.25/x
  3. Step 3: Cross multiply
    289.50x = 434.25 × 161.25
  4. Step 4: Simplify right side
    289.50x = 70,022.81
  5. Step 5: Solve for x
    x = 70,022.81/289.50
  6. Step 6: Final answer
    x = 241.88

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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.