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Finding the Fourth Proportional to 2,855.01, 3,940.58 and 1,858.56

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Solution

The fourth proportional to 2,855.01, 3,940.58 and 1,858.56 is: 2,565.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.01 : 3,940.58 = 1,858.56 : x
  2. Step 2: Convert to fraction form
    2,855.01/3,940.58 = 1,858.56/x
  3. Step 3: Cross multiply
    2,855.01x = 3,940.58 × 1,858.56
  4. Step 4: Simplify right side
    2,855.01x = 7,323,804.36
  5. Step 5: Solve for x
    x = 7,323,804.36/2,855.01
  6. Step 6: Final answer
    x = 2,565.25

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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.