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Finding the Fourth Proportional to 381.80, 526.97 and 316.19

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Solution

The fourth proportional to 381.80, 526.97 and 316.19 is: 436.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.80 : 526.97 = 316.19 : x
  2. Step 2: Convert to fraction form
    381.80/526.97 = 316.19/x
  3. Step 3: Cross multiply
    381.80x = 526.97 × 316.19
  4. Step 4: Simplify right side
    381.80x = 166,624.75
  5. Step 5: Solve for x
    x = 166,624.75/381.80
  6. Step 6: Final answer
    x = 436.42

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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.