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Finding the Fourth Proportional to 408.21, 563.31 and 268.13

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Solution

The fourth proportional to 408.21, 563.31 and 268.13 is: 370.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.21 : 563.31 = 268.13 : x
  2. Step 2: Convert to fraction form
    408.21/563.31 = 268.13/x
  3. Step 3: Cross multiply
    408.21x = 563.31 × 268.13
  4. Step 4: Simplify right side
    408.21x = 151,037.49
  5. Step 5: Solve for x
    x = 151,037.49/408.21
  6. Step 6: Final answer
    x = 370.00

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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.