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Finding the Fourth Proportional to 518.70, 776.91 and 382.95

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Solution

The fourth proportional to 518.70, 776.91 and 382.95 is: 573.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.70 : 776.91 = 382.95 : x
  2. Step 2: Convert to fraction form
    518.70/776.91 = 382.95/x
  3. Step 3: Cross multiply
    518.70x = 776.91 × 382.95
  4. Step 4: Simplify right side
    518.70x = 297,517.68
  5. Step 5: Solve for x
    x = 297,517.68/518.70
  6. Step 6: Final answer
    x = 573.58

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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.