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Finding the Fourth Proportional to 246.42, 338.90 and 197.20

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Solution

The fourth proportional to 246.42, 338.90 and 197.20 is: 271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.42 : 338.90 = 197.20 : x
  2. Step 2: Convert to fraction form
    246.42/338.90 = 197.20/x
  3. Step 3: Cross multiply
    246.42x = 338.90 × 197.20
  4. Step 4: Simplify right side
    246.42x = 66,831.08
  5. Step 5: Solve for x
    x = 66,831.08/246.42
  6. Step 6: Final answer
    x = 271.21

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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.