Home / 2,120.64-3,182.40-1,095.36

Finding the Fourth Proportional to 2,120.64, 3,182.40 and 1,095.36

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Solution

The fourth proportional to 2,120.64, 3,182.40 and 1,095.36 is: 1,643.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.64 : 3,182.40 = 1,095.36 : x
  2. Step 2: Convert to fraction form
    2,120.64/3,182.40 = 1,095.36/x
  3. Step 3: Cross multiply
    2,120.64x = 3,182.40 × 1,095.36
  4. Step 4: Simplify right side
    2,120.64x = 3,485,873.66
  5. Step 5: Solve for x
    x = 3,485,873.66/2,120.64
  6. Step 6: Final answer
    x = 1,643.78

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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.