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Finding the Fourth Proportional to 348.80, 480.96 and 275.20

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Solution

The fourth proportional to 348.80, 480.96 and 275.20 is: 379.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.80 : 480.96 = 275.20 : x
  2. Step 2: Convert to fraction form
    348.80/480.96 = 275.20/x
  3. Step 3: Cross multiply
    348.80x = 480.96 × 275.20
  4. Step 4: Simplify right side
    348.80x = 132,360.19
  5. Step 5: Solve for x
    x = 132,360.19/348.80
  6. Step 6: Final answer
    x = 379.47

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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.