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Finding the Fourth Proportional to 266.57, 367.79 and 156.07

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Solution

The fourth proportional to 266.57, 367.79 and 156.07 is: 215.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.57 : 367.79 = 156.07 : x
  2. Step 2: Convert to fraction form
    266.57/367.79 = 156.07/x
  3. Step 3: Cross multiply
    266.57x = 367.79 × 156.07
  4. Step 4: Simplify right side
    266.57x = 57,400.99
  5. Step 5: Solve for x
    x = 57,400.99/266.57
  6. Step 6: Final answer
    x = 215.33

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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.