Home / 2,107.13-2,907.78-1,211.03

Finding the Fourth Proportional to 2,107.13, 2,907.78 and 1,211.03

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Solution

The fourth proportional to 2,107.13, 2,907.78 and 1,211.03 is: 1,671.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.13 : 2,907.78 = 1,211.03 : x
  2. Step 2: Convert to fraction form
    2,107.13/2,907.78 = 1,211.03/x
  3. Step 3: Cross multiply
    2,107.13x = 2,907.78 × 1,211.03
  4. Step 4: Simplify right side
    2,107.13x = 3,521,408.81
  5. Step 5: Solve for x
    x = 3,521,408.81/2,107.13
  6. Step 6: Final answer
    x = 1,671.19

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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.