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Finding the Fourth Proportional to 266.72, 366.77 and 213.59

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Solution

The fourth proportional to 266.72, 366.77 and 213.59 is: 293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.72 : 366.77 = 213.59 : x
  2. Step 2: Convert to fraction form
    266.72/366.77 = 213.59/x
  3. Step 3: Cross multiply
    266.72x = 366.77 × 213.59
  4. Step 4: Simplify right side
    266.72x = 78,335.50
  5. Step 5: Solve for x
    x = 78,335.50/266.72
  6. Step 6: Final answer
    x = 293.70

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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.