Home / 1,408.25-2,112.38-382.25

Finding the Fourth Proportional to 1,408.25, 2,112.38 and 382.25

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Solution

The fourth proportional to 1,408.25, 2,112.38 and 382.25 is: 573.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.25 : 2,112.38 = 382.25 : x
  2. Step 2: Convert to fraction form
    1,408.25/2,112.38 = 382.25/x
  3. Step 3: Cross multiply
    1,408.25x = 2,112.38 × 382.25
  4. Step 4: Simplify right side
    1,408.25x = 807,457.26
  5. Step 5: Solve for x
    x = 807,457.26/1,408.25
  6. Step 6: Final answer
    x = 573.38

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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.