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Finding the Fourth Proportional to 290.94, 435.78 and 270.28

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Solution

The fourth proportional to 290.94, 435.78 and 270.28 is: 404.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.94 : 435.78 = 270.28 : x
  2. Step 2: Convert to fraction form
    290.94/435.78 = 270.28/x
  3. Step 3: Cross multiply
    290.94x = 435.78 × 270.28
  4. Step 4: Simplify right side
    290.94x = 117,782.62
  5. Step 5: Solve for x
    x = 117,782.62/290.94
  6. Step 6: Final answer
    x = 404.83

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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.