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Finding the Fourth Proportional to 246.80, 370.20 and 213.86

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Solution

The fourth proportional to 246.80, 370.20 and 213.86 is: 320.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.80 : 370.20 = 213.86 : x
  2. Step 2: Convert to fraction form
    246.80/370.20 = 213.86/x
  3. Step 3: Cross multiply
    246.80x = 370.20 × 213.86
  4. Step 4: Simplify right side
    246.80x = 79,170.97
  5. Step 5: Solve for x
    x = 79,170.97/246.80
  6. Step 6: Final answer
    x = 320.79

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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.