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Finding the Fourth Proportional to 262.08, 391.12 and 255.04

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Solution

The fourth proportional to 262.08, 391.12 and 255.04 is: 380.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.08 : 391.12 = 255.04 : x
  2. Step 2: Convert to fraction form
    262.08/391.12 = 255.04/x
  3. Step 3: Cross multiply
    262.08x = 391.12 × 255.04
  4. Step 4: Simplify right side
    262.08x = 99,751.24
  5. Step 5: Solve for x
    x = 99,751.24/262.08
  6. Step 6: Final answer
    x = 380.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.