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Finding the Fourth Proportional to 266.82, 368.72 and 217.68

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Solution

The fourth proportional to 266.82, 368.72 and 217.68 is: 300.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.82 : 368.72 = 217.68 : x
  2. Step 2: Convert to fraction form
    266.82/368.72 = 217.68/x
  3. Step 3: Cross multiply
    266.82x = 368.72 × 217.68
  4. Step 4: Simplify right side
    266.82x = 80,260.04
  5. Step 5: Solve for x
    x = 80,260.04/266.82
  6. Step 6: Final answer
    x = 300.81

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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.