Home / 3,119.64-4,305.09-1,722.39

Finding the Fourth Proportional to 3,119.64, 4,305.09 and 1,722.39

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Solution

The fourth proportional to 3,119.64, 4,305.09 and 1,722.39 is: 2,376.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.64 : 4,305.09 = 1,722.39 : x
  2. Step 2: Convert to fraction form
    3,119.64/4,305.09 = 1,722.39/x
  3. Step 3: Cross multiply
    3,119.64x = 4,305.09 × 1,722.39
  4. Step 4: Simplify right side
    3,119.64x = 7,415,043.97
  5. Step 5: Solve for x
    x = 7,415,043.97/3,119.64
  6. Step 6: Final answer
    x = 2,376.89

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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.