Home / 1,946.36-2,917.11-1,390.21

Finding the Fourth Proportional to 1,946.36, 2,917.11 and 1,390.21

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Solution

The fourth proportional to 1,946.36, 2,917.11 and 1,390.21 is: 2,083.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.36 : 2,917.11 = 1,390.21 : x
  2. Step 2: Convert to fraction form
    1,946.36/2,917.11 = 1,390.21/x
  3. Step 3: Cross multiply
    1,946.36x = 2,917.11 × 1,390.21
  4. Step 4: Simplify right side
    1,946.36x = 4,055,395.49
  5. Step 5: Solve for x
    x = 4,055,395.49/1,946.36
  6. Step 6: Final answer
    x = 2,083.58

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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.