Home / 2,155.11-2,974.32-1,210.95

Finding the Fourth Proportional to 2,155.11, 2,974.32 and 1,210.95

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Solution

The fourth proportional to 2,155.11, 2,974.32 and 1,210.95 is: 1,671.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.11 : 2,974.32 = 1,210.95 : x
  2. Step 2: Convert to fraction form
    2,155.11/2,974.32 = 1,210.95/x
  3. Step 3: Cross multiply
    2,155.11x = 2,974.32 × 1,210.95
  4. Step 4: Simplify right side
    2,155.11x = 3,601,752.80
  5. Step 5: Solve for x
    x = 3,601,752.80/2,155.11
  6. Step 6: Final answer
    x = 1,671.26

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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.