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Finding the Fourth Proportional to 196.65, 271.40 and 141.57

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Solution

The fourth proportional to 196.65, 271.40 and 141.57 is: 195.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.65 : 271.40 = 141.57 : x
  2. Step 2: Convert to fraction form
    196.65/271.40 = 141.57/x
  3. Step 3: Cross multiply
    196.65x = 271.40 × 141.57
  4. Step 4: Simplify right side
    196.65x = 38,420.74
  5. Step 5: Solve for x
    x = 38,420.74/196.65
  6. Step 6: Final answer
    x = 195.38

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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.