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Finding the Fourth Proportional to 380.48, 571.20 and 378.73

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Solution

The fourth proportional to 380.48, 571.20 and 378.73 is: 568.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.48 : 571.20 = 378.73 : x
  2. Step 2: Convert to fraction form
    380.48/571.20 = 378.73/x
  3. Step 3: Cross multiply
    380.48x = 571.20 × 378.73
  4. Step 4: Simplify right side
    380.48x = 216,329.39
  5. Step 5: Solve for x
    x = 216,329.39/380.48
  6. Step 6: Final answer
    x = 568.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.