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Finding the Fourth Proportional to 1,860.80, 2,785.80 and 1,806.80

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Solution

The fourth proportional to 1,860.80, 2,785.80 and 1,806.80 is: 2,704.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.80 : 2,785.80 = 1,806.80 : x
  2. Step 2: Convert to fraction form
    1,860.80/2,785.80 = 1,806.80/x
  3. Step 3: Cross multiply
    1,860.80x = 2,785.80 × 1,806.80
  4. Step 4: Simplify right side
    1,860.80x = 5,033,383.44
  5. Step 5: Solve for x
    x = 5,033,383.44/1,860.80
  6. Step 6: Final answer
    x = 2,704.96

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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.