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Finding the Fourth Proportional to 266.21, 367.27 and 155.65

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Solution

The fourth proportional to 266.21, 367.27 and 155.65 is: 214.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.21 : 367.27 = 155.65 : x
  2. Step 2: Convert to fraction form
    266.21/367.27 = 155.65/x
  3. Step 3: Cross multiply
    266.21x = 367.27 × 155.65
  4. Step 4: Simplify right side
    266.21x = 57,165.58
  5. Step 5: Solve for x
    x = 57,165.58/266.21
  6. Step 6: Final answer
    x = 214.74

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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.