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Finding the Fourth Proportional to 381.38, 526.30 and 226.13

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Solution

The fourth proportional to 381.38, 526.30 and 226.13 is: 312.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.38 : 526.30 = 226.13 : x
  2. Step 2: Convert to fraction form
    381.38/526.30 = 226.13/x
  3. Step 3: Cross multiply
    381.38x = 526.30 × 226.13
  4. Step 4: Simplify right side
    381.38x = 119,009.02
  5. Step 5: Solve for x
    x = 119,009.02/381.38
  6. Step 6: Final answer
    x = 312.05

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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.