Home / 2,107.76-2,908.70-1,211.56

Finding the Fourth Proportional to 2,107.76, 2,908.70 and 1,211.56

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Solution

The fourth proportional to 2,107.76, 2,908.70 and 1,211.56 is: 1,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.76 : 2,908.70 = 1,211.56 : x
  2. Step 2: Convert to fraction form
    2,107.76/2,908.70 = 1,211.56/x
  3. Step 3: Cross multiply
    2,107.76x = 2,908.70 × 1,211.56
  4. Step 4: Simplify right side
    2,107.76x = 3,524,055.79
  5. Step 5: Solve for x
    x = 3,524,055.79/2,107.76
  6. Step 6: Final answer
    x = 1,671.95

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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.