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Finding the Fourth Proportional to 1,879.68, 2,804.64 and 1,868.80

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Solution

The fourth proportional to 1,879.68, 2,804.64 and 1,868.80 is: 2,788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.68 : 2,804.64 = 1,868.80 : x
  2. Step 2: Convert to fraction form
    1,879.68/2,804.64 = 1,868.80/x
  3. Step 3: Cross multiply
    1,879.68x = 2,804.64 × 1,868.80
  4. Step 4: Simplify right side
    1,879.68x = 5,241,311.23
  5. Step 5: Solve for x
    x = 5,241,311.23/1,879.68
  6. Step 6: Final answer
    x = 2,788.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.