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Finding the Fourth Proportional to 515.86, 773.84 and 255.81

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Solution

The fourth proportional to 515.86, 773.84 and 255.81 is: 383.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.86 : 773.84 = 255.81 : x
  2. Step 2: Convert to fraction form
    515.86/773.84 = 255.81/x
  3. Step 3: Cross multiply
    515.86x = 773.84 × 255.81
  4. Step 4: Simplify right side
    515.86x = 197,956.01
  5. Step 5: Solve for x
    x = 197,956.01/515.86
  6. Step 6: Final answer
    x = 383.74

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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.