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Finding the Fourth Proportional to 348.25, 481.62 and 311.35

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Solution

The fourth proportional to 348.25, 481.62 and 311.35 is: 430.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.25 : 481.62 = 311.35 : x
  2. Step 2: Convert to fraction form
    348.25/481.62 = 311.35/x
  3. Step 3: Cross multiply
    348.25x = 481.62 × 311.35
  4. Step 4: Simplify right side
    348.25x = 149,952.39
  5. Step 5: Solve for x
    x = 149,952.39/348.25
  6. Step 6: Final answer
    x = 430.59

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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.