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Finding the Fourth Proportional to 2,619.25, 3,928.84 and 864.26

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Solution

The fourth proportional to 2,619.25, 3,928.84 and 864.26 is: 1,296.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.25 : 3,928.84 = 864.26 : x
  2. Step 2: Convert to fraction form
    2,619.25/3,928.84 = 864.26/x
  3. Step 3: Cross multiply
    2,619.25x = 3,928.84 × 864.26
  4. Step 4: Simplify right side
    2,619.25x = 3,395,539.26
  5. Step 5: Solve for x
    x = 3,395,539.26/2,619.25
  6. Step 6: Final answer
    x = 1,296.38

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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.