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Finding the Fourth Proportional to 293.55, 405.21 and 223.61

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Solution

The fourth proportional to 293.55, 405.21 and 223.61 is: 308.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.55 : 405.21 = 223.61 : x
  2. Step 2: Convert to fraction form
    293.55/405.21 = 223.61/x
  3. Step 3: Cross multiply
    293.55x = 405.21 × 223.61
  4. Step 4: Simplify right side
    293.55x = 90,606.98
  5. Step 5: Solve for x
    x = 90,606.98/293.55
  6. Step 6: Final answer
    x = 308.66

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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.