Home / 1,408.11-2,109.97-1,261.06

Finding the Fourth Proportional to 1,408.11, 2,109.97 and 1,261.06

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Solution

The fourth proportional to 1,408.11, 2,109.97 and 1,261.06 is: 1,889.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.11 : 2,109.97 = 1,261.06 : x
  2. Step 2: Convert to fraction form
    1,408.11/2,109.97 = 1,261.06/x
  3. Step 3: Cross multiply
    1,408.11x = 2,109.97 × 1,261.06
  4. Step 4: Simplify right side
    1,408.11x = 2,660,798.77
  5. Step 5: Solve for x
    x = 2,660,798.77/1,408.11
  6. Step 6: Final answer
    x = 1,889.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.