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Finding the Fourth Proportional to 267.11, 368.79 and 172.75

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Solution

The fourth proportional to 267.11, 368.79 and 172.75 is: 238.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.11 : 368.79 = 172.75 : x
  2. Step 2: Convert to fraction form
    267.11/368.79 = 172.75/x
  3. Step 3: Cross multiply
    267.11x = 368.79 × 172.75
  4. Step 4: Simplify right side
    267.11x = 63,707.55
  5. Step 5: Solve for x
    x = 63,707.55/267.11
  6. Step 6: Final answer
    x = 238.50

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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.