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Finding the Fourth Proportional to 515.69, 773.57 and 223.25

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Solution

The fourth proportional to 515.69, 773.57 and 223.25 is: 334.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.69 : 773.57 = 223.25 : x
  2. Step 2: Convert to fraction form
    515.69/773.57 = 223.25/x
  3. Step 3: Cross multiply
    515.69x = 773.57 × 223.25
  4. Step 4: Simplify right side
    515.69x = 172,694.52
  5. Step 5: Solve for x
    x = 172,694.52/515.69
  6. Step 6: Final answer
    x = 334.88

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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.