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Finding the Fourth Proportional to 344.20, 515.74 and 215.68

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Solution

The fourth proportional to 344.20, 515.74 and 215.68 is: 323.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.20 : 515.74 = 215.68 : x
  2. Step 2: Convert to fraction form
    344.20/515.74 = 215.68/x
  3. Step 3: Cross multiply
    344.20x = 515.74 × 215.68
  4. Step 4: Simplify right side
    344.20x = 111,234.80
  5. Step 5: Solve for x
    x = 111,234.80/344.20
  6. Step 6: Final answer
    x = 323.17

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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.