Home / 1,408.20-2,102.28-1,189.44

Finding the Fourth Proportional to 1,408.20, 2,102.28 and 1,189.44

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Solution

The fourth proportional to 1,408.20, 2,102.28 and 1,189.44 is: 1,775.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.20 : 2,102.28 = 1,189.44 : x
  2. Step 2: Convert to fraction form
    1,408.20/2,102.28 = 1,189.44/x
  3. Step 3: Cross multiply
    1,408.20x = 2,102.28 × 1,189.44
  4. Step 4: Simplify right side
    1,408.20x = 2,500,535.92
  5. Step 5: Solve for x
    x = 2,500,535.92/1,408.20
  6. Step 6: Final answer
    x = 1,775.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.