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Finding the Fourth Proportional to 378.09, 521.88 and 267.60

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Solution

The fourth proportional to 378.09, 521.88 and 267.60 is: 369.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.09 : 521.88 = 267.60 : x
  2. Step 2: Convert to fraction form
    378.09/521.88 = 267.60/x
  3. Step 3: Cross multiply
    378.09x = 521.88 × 267.60
  4. Step 4: Simplify right side
    378.09x = 139,655.09
  5. Step 5: Solve for x
    x = 139,655.09/378.09
  6. Step 6: Final answer
    x = 369.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.