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Finding the Fourth Proportional to 246.70, 340.42 and 143.20

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Solution

The fourth proportional to 246.70, 340.42 and 143.20 is: 197.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.70 : 340.42 = 143.20 : x
  2. Step 2: Convert to fraction form
    246.70/340.42 = 143.20/x
  3. Step 3: Cross multiply
    246.70x = 340.42 × 143.20
  4. Step 4: Simplify right side
    246.70x = 48,748.14
  5. Step 5: Solve for x
    x = 48,748.14/246.70
  6. Step 6: Final answer
    x = 197.60

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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.