Home / 1,408.13-2,112.25-483.69

Finding the Fourth Proportional to 1,408.13, 2,112.25 and 483.69

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Solution

The fourth proportional to 1,408.13, 2,112.25 and 483.69 is: 725.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.13 : 2,112.25 = 483.69 : x
  2. Step 2: Convert to fraction form
    1,408.13/2,112.25 = 483.69/x
  3. Step 3: Cross multiply
    1,408.13x = 2,112.25 × 483.69
  4. Step 4: Simplify right side
    1,408.13x = 1,021,665.36
  5. Step 5: Solve for x
    x = 1,021,665.36/1,408.13
  6. Step 6: Final answer
    x = 725.55

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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.