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Finding the Fourth Proportional to 511.87, 767.71 and 326.79

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Solution

The fourth proportional to 511.87, 767.71 and 326.79 is: 490.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.87 : 767.71 = 326.79 : x
  2. Step 2: Convert to fraction form
    511.87/767.71 = 326.79/x
  3. Step 3: Cross multiply
    511.87x = 767.71 × 326.79
  4. Step 4: Simplify right side
    511.87x = 250,879.95
  5. Step 5: Solve for x
    x = 250,879.95/511.87
  6. Step 6: Final answer
    x = 490.12

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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.