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Finding the Fourth Proportional to 404.03, 605.91 and 209.16

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Solution

The fourth proportional to 404.03, 605.91 and 209.16 is: 313.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.03 : 605.91 = 209.16 : x
  2. Step 2: Convert to fraction form
    404.03/605.91 = 209.16/x
  3. Step 3: Cross multiply
    404.03x = 605.91 × 209.16
  4. Step 4: Simplify right side
    404.03x = 126,732.92
  5. Step 5: Solve for x
    x = 126,732.92/404.03
  6. Step 6: Final answer
    x = 313.67

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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.