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Finding the Fourth Proportional to 196.99, 271.74 and 157.62

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Solution

The fourth proportional to 196.99, 271.74 and 157.62 is: 217.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.99 : 271.74 = 157.62 : x
  2. Step 2: Convert to fraction form
    196.99/271.74 = 157.62/x
  3. Step 3: Cross multiply
    196.99x = 271.74 × 157.62
  4. Step 4: Simplify right side
    196.99x = 42,831.66
  5. Step 5: Solve for x
    x = 42,831.66/196.99
  6. Step 6: Final answer
    x = 217.43

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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.