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Finding the Fourth Proportional to 515.79, 773.13 and 190.98

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Solution

The fourth proportional to 515.79, 773.13 and 190.98 is: 286.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.79 : 773.13 = 190.98 : x
  2. Step 2: Convert to fraction form
    515.79/773.13 = 190.98/x
  3. Step 3: Cross multiply
    515.79x = 773.13 × 190.98
  4. Step 4: Simplify right side
    515.79x = 147,652.37
  5. Step 5: Solve for x
    x = 147,652.37/515.79
  6. Step 6: Final answer
    x = 286.26

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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.