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Finding the Fourth Proportional to 348.40, 480.79 and 191.03

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Solution

The fourth proportional to 348.40, 480.79 and 191.03 is: 263.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.40 : 480.79 = 191.03 : x
  2. Step 2: Convert to fraction form
    348.40/480.79 = 191.03/x
  3. Step 3: Cross multiply
    348.40x = 480.79 × 191.03
  4. Step 4: Simplify right side
    348.40x = 91,844.72
  5. Step 5: Solve for x
    x = 91,844.72/348.40
  6. Step 6: Final answer
    x = 263.62

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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.