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Finding the Fourth Proportional to 378.44, 567.70 and 104.54

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Solution

The fourth proportional to 378.44, 567.70 and 104.54 is: 156.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.44 : 567.70 = 104.54 : x
  2. Step 2: Convert to fraction form
    378.44/567.70 = 104.54/x
  3. Step 3: Cross multiply
    378.44x = 567.70 × 104.54
  4. Step 4: Simplify right side
    378.44x = 59,344.26
  5. Step 5: Solve for x
    x = 59,344.26/378.44
  6. Step 6: Final answer
    x = 156.81

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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.