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Finding the Fourth Proportional to 515.92, 773.90 and 394.92

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Solution

The fourth proportional to 515.92, 773.90 and 394.92 is: 592.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.92 : 773.90 = 394.92 : x
  2. Step 2: Convert to fraction form
    515.92/773.90 = 394.92/x
  3. Step 3: Cross multiply
    515.92x = 773.90 × 394.92
  4. Step 4: Simplify right side
    515.92x = 305,628.59
  5. Step 5: Solve for x
    x = 305,628.59/515.92
  6. Step 6: Final answer
    x = 592.40

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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.