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Finding the Fourth Proportional to 515.89, 774 and 343.23

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Solution

The fourth proportional to 515.89, 774 and 343.23 is: 514.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.89 : 774 = 343.23 : x
  2. Step 2: Convert to fraction form
    515.89/774 = 343.23/x
  3. Step 3: Cross multiply
    515.89x = 774 × 343.23
  4. Step 4: Simplify right side
    515.89x = 265,660.02
  5. Step 5: Solve for x
    x = 265,660.02/515.89
  6. Step 6: Final answer
    x = 514.95

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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.