Home / 2,619.12-3,611.04-1,990.32

Finding the Fourth Proportional to 2,619.12, 3,611.04 and 1,990.32

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Solution

The fourth proportional to 2,619.12, 3,611.04 and 1,990.32 is: 2,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.12 : 3,611.04 = 1,990.32 : x
  2. Step 2: Convert to fraction form
    2,619.12/3,611.04 = 1,990.32/x
  3. Step 3: Cross multiply
    2,619.12x = 3,611.04 × 1,990.32
  4. Step 4: Simplify right side
    2,619.12x = 7,187,125.13
  5. Step 5: Solve for x
    x = 7,187,125.13/2,619.12
  6. Step 6: Final answer
    x = 2,744.10

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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.