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Finding the Fourth Proportional to 255.36, 380.94 and 243.75

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Solution

The fourth proportional to 255.36, 380.94 and 243.75 is: 363.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.36 : 380.94 = 243.75 : x
  2. Step 2: Convert to fraction form
    255.36/380.94 = 243.75/x
  3. Step 3: Cross multiply
    255.36x = 380.94 × 243.75
  4. Step 4: Simplify right side
    255.36x = 92,854.13
  5. Step 5: Solve for x
    x = 92,854.13/255.36
  6. Step 6: Final answer
    x = 363.62

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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.