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Finding the Fourth Proportional to 486.69, 729.39 and 226.65

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Solution

The fourth proportional to 486.69, 729.39 and 226.65 is: 339.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.69 : 729.39 = 226.65 : x
  2. Step 2: Convert to fraction form
    486.69/729.39 = 226.65/x
  3. Step 3: Cross multiply
    486.69x = 729.39 × 226.65
  4. Step 4: Simplify right side
    486.69x = 165,316.24
  5. Step 5: Solve for x
    x = 165,316.24/486.69
  6. Step 6: Final answer
    x = 339.67

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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.