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Finding the Fourth Proportional to 266.16, 367.30 and 155.65

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Solution

The fourth proportional to 266.16, 367.30 and 155.65 is: 214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.16 : 367.30 = 155.65 : x
  2. Step 2: Convert to fraction form
    266.16/367.30 = 155.65/x
  3. Step 3: Cross multiply
    266.16x = 367.30 × 155.65
  4. Step 4: Simplify right side
    266.16x = 57,170.38
  5. Step 5: Solve for x
    x = 57,170.38/266.16
  6. Step 6: Final answer
    x = 214.80

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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.