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Finding the Fourth Proportional to 380.54, 571.62 and 378.12

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Solution

The fourth proportional to 380.54, 571.62 and 378.12 is: 567.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.54 : 571.62 = 378.12 : x
  2. Step 2: Convert to fraction form
    380.54/571.62 = 378.12/x
  3. Step 3: Cross multiply
    380.54x = 571.62 × 378.12
  4. Step 4: Simplify right side
    380.54x = 216,140.95
  5. Step 5: Solve for x
    x = 216,140.95/380.54
  6. Step 6: Final answer
    x = 567.98

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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.