Home / 2,137.80-3,205.38-837.78

Finding the Fourth Proportional to 2,137.80, 3,205.38 and 837.78

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Solution

The fourth proportional to 2,137.80, 3,205.38 and 837.78 is: 1,256.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.80 : 3,205.38 = 837.78 : x
  2. Step 2: Convert to fraction form
    2,137.80/3,205.38 = 837.78/x
  3. Step 3: Cross multiply
    2,137.80x = 3,205.38 × 837.78
  4. Step 4: Simplify right side
    2,137.80x = 2,685,403.26
  5. Step 5: Solve for x
    x = 2,685,403.26/2,137.80
  6. Step 6: Final answer
    x = 1,256.15

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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.