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Finding the Fourth Proportional to 1,906.50, 2,859.45 and 519.95

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Solution

The fourth proportional to 1,906.50, 2,859.45 and 519.95 is: 779.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.50 : 2,859.45 = 519.95 : x
  2. Step 2: Convert to fraction form
    1,906.50/2,859.45 = 519.95/x
  3. Step 3: Cross multiply
    1,906.50x = 2,859.45 × 519.95
  4. Step 4: Simplify right side
    1,906.50x = 1,486,757.71
  5. Step 5: Solve for x
    x = 1,486,757.71/1,906.50
  6. Step 6: Final answer
    x = 779.84

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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.