Home / 2,821.88-3,894.58-1,643.32

Finding the Fourth Proportional to 2,821.88, 3,894.58 and 1,643.32

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Solution

The fourth proportional to 2,821.88, 3,894.58 and 1,643.32 is: 2,268.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.88 : 3,894.58 = 1,643.32 : x
  2. Step 2: Convert to fraction form
    2,821.88/3,894.58 = 1,643.32/x
  3. Step 3: Cross multiply
    2,821.88x = 3,894.58 × 1,643.32
  4. Step 4: Simplify right side
    2,821.88x = 6,400,041.21
  5. Step 5: Solve for x
    x = 6,400,041.21/2,821.88
  6. Step 6: Final answer
    x = 2,268.01

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1.5x scale

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.