Home / 2,321.82-3,204.11-1,390.32

Finding the Fourth Proportional to 2,321.82, 3,204.11 and 1,390.32

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Solution

The fourth proportional to 2,321.82, 3,204.11 and 1,390.32 is: 1,918.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.82 : 3,204.11 = 1,390.32 : x
  2. Step 2: Convert to fraction form
    2,321.82/3,204.11 = 1,390.32/x
  3. Step 3: Cross multiply
    2,321.82x = 3,204.11 × 1,390.32
  4. Step 4: Simplify right side
    2,321.82x = 4,454,731.26
  5. Step 5: Solve for x
    x = 4,454,731.26/2,321.82
  6. Step 6: Final answer
    x = 1,918.64

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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.