Home / 2,138.19-2,949.87-1,298.61

Finding the Fourth Proportional to 2,138.19, 2,949.87 and 1,298.61

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Solution

The fourth proportional to 2,138.19, 2,949.87 and 1,298.61 is: 1,791.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.19 : 2,949.87 = 1,298.61 : x
  2. Step 2: Convert to fraction form
    2,138.19/2,949.87 = 1,298.61/x
  3. Step 3: Cross multiply
    2,138.19x = 2,949.87 × 1,298.61
  4. Step 4: Simplify right side
    2,138.19x = 3,830,730.68
  5. Step 5: Solve for x
    x = 3,830,730.68/2,138.19
  6. Step 6: Final answer
    x = 1,791.58

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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.