Home / 1,815.21-2,720.79-1,122.39

Finding the Fourth Proportional to 1,815.21, 2,720.79 and 1,122.39

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Solution

The fourth proportional to 1,815.21, 2,720.79 and 1,122.39 is: 1,682.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.21 : 2,720.79 = 1,122.39 : x
  2. Step 2: Convert to fraction form
    1,815.21/2,720.79 = 1,122.39/x
  3. Step 3: Cross multiply
    1,815.21x = 2,720.79 × 1,122.39
  4. Step 4: Simplify right side
    1,815.21x = 3,053,787.49
  5. Step 5: Solve for x
    x = 3,053,787.49/1,815.21
  6. Step 6: Final answer
    x = 1,682.33

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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.