Home / 2,155.23-2,974.30-1,211.04

Finding the Fourth Proportional to 2,155.23, 2,974.30 and 1,211.04

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Solution

The fourth proportional to 2,155.23, 2,974.30 and 1,211.04 is: 1,671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.23 : 2,974.30 = 1,211.04 : x
  2. Step 2: Convert to fraction form
    2,155.23/2,974.30 = 1,211.04/x
  3. Step 3: Cross multiply
    2,155.23x = 2,974.30 × 1,211.04
  4. Step 4: Simplify right side
    2,155.23x = 3,601,993.24
  5. Step 5: Solve for x
    x = 3,601,993.24/2,155.23
  6. Step 6: Final answer
    x = 1,671.28

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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.