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Finding the Fourth Proportional to 266.28, 367.32 and 161.40

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Solution

The fourth proportional to 266.28, 367.32 and 161.40 is: 222.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.28 : 367.32 = 161.40 : x
  2. Step 2: Convert to fraction form
    266.28/367.32 = 161.40/x
  3. Step 3: Cross multiply
    266.28x = 367.32 × 161.40
  4. Step 4: Simplify right side
    266.28x = 59,285.45
  5. Step 5: Solve for x
    x = 59,285.45/266.28
  6. Step 6: Final answer
    x = 222.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.