Home / 1,408.20-2,112.30-483.45

Finding the Fourth Proportional to 1,408.20, 2,112.30 and 483.45

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Solution

The fourth proportional to 1,408.20, 2,112.30 and 483.45 is: 725.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.20 : 2,112.30 = 483.45 : x
  2. Step 2: Convert to fraction form
    1,408.20/2,112.30 = 483.45/x
  3. Step 3: Cross multiply
    1,408.20x = 2,112.30 × 483.45
  4. Step 4: Simplify right side
    1,408.20x = 1,021,191.44
  5. Step 5: Solve for x
    x = 1,021,191.44/1,408.20
  6. Step 6: Final answer
    x = 725.18

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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.