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Finding the Fourth Proportional to 2,179.36, 3,268.93 and 678.37

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Solution

The fourth proportional to 2,179.36, 3,268.93 and 678.37 is: 1,017.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.36 : 3,268.93 = 678.37 : x
  2. Step 2: Convert to fraction form
    2,179.36/3,268.93 = 678.37/x
  3. Step 3: Cross multiply
    2,179.36x = 3,268.93 × 678.37
  4. Step 4: Simplify right side
    2,179.36x = 2,217,544.04
  5. Step 5: Solve for x
    x = 2,217,544.04/2,179.36
  6. Step 6: Final answer
    x = 1,017.52

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1.5x scale

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.