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Finding the Fourth Proportional to 381.19, 526.18 and 223.88

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Solution

The fourth proportional to 381.19, 526.18 and 223.88 is: 309.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.19 : 526.18 = 223.88 : x
  2. Step 2: Convert to fraction form
    381.19/526.18 = 223.88/x
  3. Step 3: Cross multiply
    381.19x = 526.18 × 223.88
  4. Step 4: Simplify right side
    381.19x = 117,797.43
  5. Step 5: Solve for x
    x = 117,797.43/381.19
  6. Step 6: Final answer
    x = 309.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.