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Finding the Fourth Proportional to 515.96, 774 and 186.84

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Solution

The fourth proportional to 515.96, 774 and 186.84 is: 280.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.96 : 774 = 186.84 : x
  2. Step 2: Convert to fraction form
    515.96/774 = 186.84/x
  3. Step 3: Cross multiply
    515.96x = 774 × 186.84
  4. Step 4: Simplify right side
    515.96x = 144,614.16
  5. Step 5: Solve for x
    x = 144,614.16/515.96
  6. Step 6: Final answer
    x = 280.28

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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.