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Finding the Fourth Proportional to 381.90, 526.99 and 224.54

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Solution

The fourth proportional to 381.90, 526.99 and 224.54 is: 309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.90 : 526.99 = 224.54 : x
  2. Step 2: Convert to fraction form
    381.90/526.99 = 224.54/x
  3. Step 3: Cross multiply
    381.90x = 526.99 × 224.54
  4. Step 4: Simplify right side
    381.90x = 118,330.66
  5. Step 5: Solve for x
    x = 118,330.66/381.90
  6. Step 6: Final answer
    x = 309.85

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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.