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Finding the Fourth Proportional to 394.56, 591.93 and 120.67

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Solution

The fourth proportional to 394.56, 591.93 and 120.67 is: 181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.56 : 591.93 = 120.67 : x
  2. Step 2: Convert to fraction form
    394.56/591.93 = 120.67/x
  3. Step 3: Cross multiply
    394.56x = 591.93 × 120.67
  4. Step 4: Simplify right side
    394.56x = 71,428.19
  5. Step 5: Solve for x
    x = 71,428.19/394.56
  6. Step 6: Final answer
    x = 181.03

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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.