Home / 2,155.19-2,974.19-1,211.18

Finding the Fourth Proportional to 2,155.19, 2,974.19 and 1,211.18

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Solution

The fourth proportional to 2,155.19, 2,974.19 and 1,211.18 is: 1,671.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.19 : 2,974.19 = 1,211.18 : x
  2. Step 2: Convert to fraction form
    2,155.19/2,974.19 = 1,211.18/x
  3. Step 3: Cross multiply
    2,155.19x = 2,974.19 × 1,211.18
  4. Step 4: Simplify right side
    2,155.19x = 3,602,258.52
  5. Step 5: Solve for x
    x = 3,602,258.52/2,155.19
  6. Step 6: Final answer
    x = 1,671.44

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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.