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Finding the Fourth Proportional to 378.52, 567.42 and 215.98

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Solution

The fourth proportional to 378.52, 567.42 and 215.98 is: 323.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.52 : 567.42 = 215.98 : x
  2. Step 2: Convert to fraction form
    378.52/567.42 = 215.98/x
  3. Step 3: Cross multiply
    378.52x = 567.42 × 215.98
  4. Step 4: Simplify right side
    378.52x = 122,551.37
  5. Step 5: Solve for x
    x = 122,551.37/378.52
  6. Step 6: Final answer
    x = 323.76

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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.