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Finding the Fourth Proportional to 404.07, 605.69 and 211.83

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Solution

The fourth proportional to 404.07, 605.69 and 211.83 is: 317.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.07 : 605.69 = 211.83 : x
  2. Step 2: Convert to fraction form
    404.07/605.69 = 211.83/x
  3. Step 3: Cross multiply
    404.07x = 605.69 × 211.83
  4. Step 4: Simplify right side
    404.07x = 128,302.25
  5. Step 5: Solve for x
    x = 128,302.25/404.07
  6. Step 6: Final answer
    x = 317.52

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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.