Home / 2,107.20-2,908.14-1,211.07

Finding the Fourth Proportional to 2,107.20, 2,908.14 and 1,211.07

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Solution

The fourth proportional to 2,107.20, 2,908.14 and 1,211.07 is: 1,671.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.20 : 2,908.14 = 1,211.07 : x
  2. Step 2: Convert to fraction form
    2,107.20/2,908.14 = 1,211.07/x
  3. Step 3: Cross multiply
    2,107.20x = 2,908.14 × 1,211.07
  4. Step 4: Simplify right side
    2,107.20x = 3,521,961.11
  5. Step 5: Solve for x
    x = 3,521,961.11/2,107.20
  6. Step 6: Final answer
    x = 1,671.39

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Half scale
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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.