Home / 2,105.19-2,903.85-1,220.27

Finding the Fourth Proportional to 2,105.19, 2,903.85 and 1,220.27

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Solution

The fourth proportional to 2,105.19, 2,903.85 and 1,220.27 is: 1,683.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.19 : 2,903.85 = 1,220.27 : x
  2. Step 2: Convert to fraction form
    2,105.19/2,903.85 = 1,220.27/x
  3. Step 3: Cross multiply
    2,105.19x = 2,903.85 × 1,220.27
  4. Step 4: Simplify right side
    2,105.19x = 3,543,466.52
  5. Step 5: Solve for x
    x = 3,543,466.52/2,105.19
  6. Step 6: Final answer
    x = 1,683.21

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1.5x scale

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.