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Finding the Fourth Proportional to 266.69, 367.96 and 156.13

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Solution

The fourth proportional to 266.69, 367.96 and 156.13 is: 215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.69 : 367.96 = 156.13 : x
  2. Step 2: Convert to fraction form
    266.69/367.96 = 156.13/x
  3. Step 3: Cross multiply
    266.69x = 367.96 × 156.13
  4. Step 4: Simplify right side
    266.69x = 57,449.59
  5. Step 5: Solve for x
    x = 57,449.59/266.69
  6. Step 6: Final answer
    x = 215.42

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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.