Home / 2,103.28-2,902.80-1,219.36

Finding the Fourth Proportional to 2,103.28, 2,902.80 and 1,219.36

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Solution

The fourth proportional to 2,103.28, 2,902.80 and 1,219.36 is: 1,682.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.28 : 2,902.80 = 1,219.36 : x
  2. Step 2: Convert to fraction form
    2,103.28/2,902.80 = 1,219.36/x
  3. Step 3: Cross multiply
    2,103.28x = 2,902.80 × 1,219.36
  4. Step 4: Simplify right side
    2,103.28x = 3,539,558.21
  5. Step 5: Solve for x
    x = 3,539,558.21/2,103.28
  6. Step 6: Final answer
    x = 1,682.88

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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.