Home / 2,106.12-2,906.87-1,398

Finding the Fourth Proportional to 2,106.12, 2,906.87 and 1,398

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Solution

The fourth proportional to 2,106.12, 2,906.87 and 1,398 is: 1,929.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.12 : 2,906.87 = 1,398 : x
  2. Step 2: Convert to fraction form
    2,106.12/2,906.87 = 1,398/x
  3. Step 3: Cross multiply
    2,106.12x = 2,906.87 × 1,398
  4. Step 4: Simplify right side
    2,106.12x = 4,063,804.26
  5. Step 5: Solve for x
    x = 4,063,804.26/2,106.12
  6. Step 6: Final answer
    x = 1,929.52

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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.