Home / 1,408.25-2,112.38-675.60

Finding the Fourth Proportional to 1,408.25, 2,112.38 and 675.60

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Solution

The fourth proportional to 1,408.25, 2,112.38 and 675.60 is: 1,013.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.25 : 2,112.38 = 675.60 : x
  2. Step 2: Convert to fraction form
    1,408.25/2,112.38 = 675.60/x
  3. Step 3: Cross multiply
    1,408.25x = 2,112.38 × 675.60
  4. Step 4: Simplify right side
    1,408.25x = 1,427,123.93
  5. Step 5: Solve for x
    x = 1,427,123.93/1,408.25
  6. Step 6: Final answer
    x = 1,013.40

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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.