Home / 3,919.51-5,877.64-1,321.03

Finding the Fourth Proportional to 3,919.51, 5,877.64 and 1,321.03

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Solution

The fourth proportional to 3,919.51, 5,877.64 and 1,321.03 is: 1,981.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.51 : 5,877.64 = 1,321.03 : x
  2. Step 2: Convert to fraction form
    3,919.51/5,877.64 = 1,321.03/x
  3. Step 3: Cross multiply
    3,919.51x = 5,877.64 × 1,321.03
  4. Step 4: Simplify right side
    3,919.51x = 7,764,538.77
  5. Step 5: Solve for x
    x = 7,764,538.77/3,919.51
  6. Step 6: Final answer
    x = 1,981.00

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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.