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Finding the Fourth Proportional to 290.11, 433.98 and 216.94

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Solution

The fourth proportional to 290.11, 433.98 and 216.94 is: 324.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.11 : 433.98 = 216.94 : x
  2. Step 2: Convert to fraction form
    290.11/433.98 = 216.94/x
  3. Step 3: Cross multiply
    290.11x = 433.98 × 216.94
  4. Step 4: Simplify right side
    290.11x = 94,147.62
  5. Step 5: Solve for x
    x = 94,147.62/290.11
  6. Step 6: Final answer
    x = 324.52

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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.