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Finding the Fourth Proportional to 381.15, 525.93 and 223.74

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Solution

The fourth proportional to 381.15, 525.93 and 223.74 is: 308.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.15 : 525.93 = 223.74 : x
  2. Step 2: Convert to fraction form
    381.15/525.93 = 223.74/x
  3. Step 3: Cross multiply
    381.15x = 525.93 × 223.74
  4. Step 4: Simplify right side
    381.15x = 117,671.58
  5. Step 5: Solve for x
    x = 117,671.58/381.15
  6. Step 6: Final answer
    x = 308.73

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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.