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Finding the Fourth Proportional to 243.75, 363.96 and 191.80

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Solution

The fourth proportional to 243.75, 363.96 and 191.80 is: 286.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.75 : 363.96 = 191.80 : x
  2. Step 2: Convert to fraction form
    243.75/363.96 = 191.80/x
  3. Step 3: Cross multiply
    243.75x = 363.96 × 191.80
  4. Step 4: Simplify right side
    243.75x = 69,807.53
  5. Step 5: Solve for x
    x = 69,807.53/243.75
  6. Step 6: Final answer
    x = 286.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.