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Finding the Fourth Proportional to 381.43, 526.35 and 224.09

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Solution

The fourth proportional to 381.43, 526.35 and 224.09 is: 309.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.43 : 526.35 = 224.09 : x
  2. Step 2: Convert to fraction form
    381.43/526.35 = 224.09/x
  3. Step 3: Cross multiply
    381.43x = 526.35 × 224.09
  4. Step 4: Simplify right side
    381.43x = 117,949.77
  5. Step 5: Solve for x
    x = 117,949.77/381.43
  6. Step 6: Final answer
    x = 309.23

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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.