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Finding the Fourth Proportional to 348.12, 479.61 and 274.41

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Solution

The fourth proportional to 348.12, 479.61 and 274.41 is: 378.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.12 : 479.61 = 274.41 : x
  2. Step 2: Convert to fraction form
    348.12/479.61 = 274.41/x
  3. Step 3: Cross multiply
    348.12x = 479.61 × 274.41
  4. Step 4: Simplify right side
    348.12x = 131,609.78
  5. Step 5: Solve for x
    x = 131,609.78/348.12
  6. Step 6: Final answer
    x = 378.06

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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.