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Finding the Fourth Proportional to 408.38, 563.74 and 290.59

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Solution

The fourth proportional to 408.38, 563.74 and 290.59 is: 401.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.38 : 563.74 = 290.59 : x
  2. Step 2: Convert to fraction form
    408.38/563.74 = 290.59/x
  3. Step 3: Cross multiply
    408.38x = 563.74 × 290.59
  4. Step 4: Simplify right side
    408.38x = 163,815.07
  5. Step 5: Solve for x
    x = 163,815.07/408.38
  6. Step 6: Final answer
    x = 401.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.