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Finding the Fourth Proportional to 194.67, 266.94 and 172.80

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Solution

The fourth proportional to 194.67, 266.94 and 172.80 is: 236.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.67 : 266.94 = 172.80 : x
  2. Step 2: Convert to fraction form
    194.67/266.94 = 172.80/x
  3. Step 3: Cross multiply
    194.67x = 266.94 × 172.80
  4. Step 4: Simplify right side
    194.67x = 46,127.23
  5. Step 5: Solve for x
    x = 46,127.23/194.67
  6. Step 6: Final answer
    x = 236.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.