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Finding the Fourth Proportional to 348.96, 480.69 and 255.45

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Solution

The fourth proportional to 348.96, 480.69 and 255.45 is: 351.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.96 : 480.69 = 255.45 : x
  2. Step 2: Convert to fraction form
    348.96/480.69 = 255.45/x
  3. Step 3: Cross multiply
    348.96x = 480.69 × 255.45
  4. Step 4: Simplify right side
    348.96x = 122,792.26
  5. Step 5: Solve for x
    x = 122,792.26/348.96
  6. Step 6: Final answer
    x = 351.88

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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.