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Finding the Fourth Proportional to 391.31, 586.97 and 301.11

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Solution

The fourth proportional to 391.31, 586.97 and 301.11 is: 451.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.31 : 586.97 = 301.11 : x
  2. Step 2: Convert to fraction form
    391.31/586.97 = 301.11/x
  3. Step 3: Cross multiply
    391.31x = 586.97 × 301.11
  4. Step 4: Simplify right side
    391.31x = 176,742.54
  5. Step 5: Solve for x
    x = 176,742.54/391.31
  6. Step 6: Final answer
    x = 451.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.