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Finding the Fourth Proportional to 378.14, 566.19 and 261.09

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Solution

The fourth proportional to 378.14, 566.19 and 261.09 is: 390.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.14 : 566.19 = 261.09 : x
  2. Step 2: Convert to fraction form
    378.14/566.19 = 261.09/x
  3. Step 3: Cross multiply
    378.14x = 566.19 × 261.09
  4. Step 4: Simplify right side
    378.14x = 147,826.55
  5. Step 5: Solve for x
    x = 147,826.55/378.14
  6. Step 6: Final answer
    x = 390.94

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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.