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Finding the Fourth Proportional to 290.64, 436.50 and 199.38

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Solution

The fourth proportional to 290.64, 436.50 and 199.38 is: 299.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.64 : 436.50 = 199.38 : x
  2. Step 2: Convert to fraction form
    290.64/436.50 = 199.38/x
  3. Step 3: Cross multiply
    290.64x = 436.50 × 199.38
  4. Step 4: Simplify right side
    290.64x = 87,029.37
  5. Step 5: Solve for x
    x = 87,029.37/290.64
  6. Step 6: Final answer
    x = 299.44

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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.