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Finding the Fourth Proportional to 271.49, 407.16 and 193.81

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Solution

The fourth proportional to 271.49, 407.16 and 193.81 is: 290.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.49 : 407.16 = 193.81 : x
  2. Step 2: Convert to fraction form
    271.49/407.16 = 193.81/x
  3. Step 3: Cross multiply
    271.49x = 407.16 × 193.81
  4. Step 4: Simplify right side
    271.49x = 78,911.68
  5. Step 5: Solve for x
    x = 78,911.68/271.49
  6. Step 6: Final answer
    x = 290.66

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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.