Home / 2,615.40-3,919.80-1,383.36

Finding the Fourth Proportional to 2,615.40, 3,919.80 and 1,383.36

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Solution

The fourth proportional to 2,615.40, 3,919.80 and 1,383.36 is: 2,073.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.40 : 3,919.80 = 1,383.36 : x
  2. Step 2: Convert to fraction form
    2,615.40/3,919.80 = 1,383.36/x
  3. Step 3: Cross multiply
    2,615.40x = 3,919.80 × 1,383.36
  4. Step 4: Simplify right side
    2,615.40x = 5,422,494.53
  5. Step 5: Solve for x
    x = 5,422,494.53/2,615.40
  6. Step 6: Final answer
    x = 2,073.29

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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.