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Finding the Fourth Proportional to 1,855.53, 2,559.78 and 1,257.81

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Solution

The fourth proportional to 1,855.53, 2,559.78 and 1,257.81 is: 1,735.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.53 : 2,559.78 = 1,257.81 : x
  2. Step 2: Convert to fraction form
    1,855.53/2,559.78 = 1,257.81/x
  3. Step 3: Cross multiply
    1,855.53x = 2,559.78 × 1,257.81
  4. Step 4: Simplify right side
    1,855.53x = 3,219,716.88
  5. Step 5: Solve for x
    x = 3,219,716.88/1,855.53
  6. Step 6: Final answer
    x = 1,735.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.