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Finding the Fourth Proportional to 266.34, 367.49 and 154.28

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Solution

The fourth proportional to 266.34, 367.49 and 154.28 is: 212.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.34 : 367.49 = 154.28 : x
  2. Step 2: Convert to fraction form
    266.34/367.49 = 154.28/x
  3. Step 3: Cross multiply
    266.34x = 367.49 × 154.28
  4. Step 4: Simplify right side
    266.34x = 56,693.75
  5. Step 5: Solve for x
    x = 56,693.75/266.34
  6. Step 6: Final answer
    x = 212.86

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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.