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Finding the Fourth Proportional to 518.76, 779.37 and 482.31

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Solution

The fourth proportional to 518.76, 779.37 and 482.31 is: 724.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.76 : 779.37 = 482.31 : x
  2. Step 2: Convert to fraction form
    518.76/779.37 = 482.31/x
  3. Step 3: Cross multiply
    518.76x = 779.37 × 482.31
  4. Step 4: Simplify right side
    518.76x = 375,897.94
  5. Step 5: Solve for x
    x = 375,897.94/518.76
  6. Step 6: Final answer
    x = 724.61

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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.