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Finding the Fourth Proportional to 515.28, 773.16 and 190.80

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Solution

The fourth proportional to 515.28, 773.16 and 190.80 is: 286.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.28 : 773.16 = 190.80 : x
  2. Step 2: Convert to fraction form
    515.28/773.16 = 190.80/x
  3. Step 3: Cross multiply
    515.28x = 773.16 × 190.80
  4. Step 4: Simplify right side
    515.28x = 147,518.93
  5. Step 5: Solve for x
    x = 147,518.93/515.28
  6. Step 6: Final answer
    x = 286.29

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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.