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Finding the Fourth Proportional to 378.05, 567.20 and 262.72

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Solution

The fourth proportional to 378.05, 567.20 and 262.72 is: 394.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.05 : 567.20 = 262.72 : x
  2. Step 2: Convert to fraction form
    378.05/567.20 = 262.72/x
  3. Step 3: Cross multiply
    378.05x = 567.20 × 262.72
  4. Step 4: Simplify right side
    378.05x = 149,016.15
  5. Step 5: Solve for x
    x = 149,016.15/378.05
  6. Step 6: Final answer
    x = 394.18

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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.