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Finding the Fourth Proportional to 348.31, 480.90 and 243.61

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Solution

The fourth proportional to 348.31, 480.90 and 243.61 is: 336.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.31 : 480.90 = 243.61 : x
  2. Step 2: Convert to fraction form
    348.31/480.90 = 243.61/x
  3. Step 3: Cross multiply
    348.31x = 480.90 × 243.61
  4. Step 4: Simplify right side
    348.31x = 117,152.05
  5. Step 5: Solve for x
    x = 117,152.05/348.31
  6. Step 6: Final answer
    x = 336.34

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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.