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Finding the Fourth Proportional to 408.34, 563.61 and 268.21

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Solution

The fourth proportional to 408.34, 563.61 and 268.21 is: 370.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.34 : 563.61 = 268.21 : x
  2. Step 2: Convert to fraction form
    408.34/563.61 = 268.21/x
  3. Step 3: Cross multiply
    408.34x = 563.61 × 268.21
  4. Step 4: Simplify right side
    408.34x = 151,165.84
  5. Step 5: Solve for x
    x = 151,165.84/408.34
  6. Step 6: Final answer
    x = 370.20

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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.