Home / 2,419.12-3,622.38-1,321.23

Finding the Fourth Proportional to 2,419.12, 3,622.38 and 1,321.23

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Solution

The fourth proportional to 2,419.12, 3,622.38 and 1,321.23 is: 1,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.12 : 3,622.38 = 1,321.23 : x
  2. Step 2: Convert to fraction form
    2,419.12/3,622.38 = 1,321.23/x
  3. Step 3: Cross multiply
    2,419.12x = 3,622.38 × 1,321.23
  4. Step 4: Simplify right side
    2,419.12x = 4,785,997.13
  5. Step 5: Solve for x
    x = 4,785,997.13/2,419.12
  6. Step 6: Final answer
    x = 1,978.40

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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.