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Finding the Fourth Proportional to 381.38, 526.30 and 323.46

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Solution

The fourth proportional to 381.38, 526.30 and 323.46 is: 446.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.38 : 526.30 = 323.46 : x
  2. Step 2: Convert to fraction form
    381.38/526.30 = 323.46/x
  3. Step 3: Cross multiply
    381.38x = 526.30 × 323.46
  4. Step 4: Simplify right side
    381.38x = 170,236.19
  5. Step 5: Solve for x
    x = 170,236.19/381.38
  6. Step 6: Final answer
    x = 446.37

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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.