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Finding the Fourth Proportional to 408.30, 563.45 and 260.97

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Solution

The fourth proportional to 408.30, 563.45 and 260.97 is: 360.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.30 : 563.45 = 260.97 : x
  2. Step 2: Convert to fraction form
    408.30/563.45 = 260.97/x
  3. Step 3: Cross multiply
    408.30x = 563.45 × 260.97
  4. Step 4: Simplify right side
    408.30x = 147,042.24
  5. Step 5: Solve for x
    x = 147,042.24/408.30
  6. Step 6: Final answer
    x = 360.13

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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.