Home / 1,408.18-2,107.75-749.14

Finding the Fourth Proportional to 1,408.18, 2,107.75 and 749.14

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Solution

The fourth proportional to 1,408.18, 2,107.75 and 749.14 is: 1,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,408.18 : 2,107.75 = 749.14 : x
  2. Step 2: Convert to fraction form
    1,408.18/2,107.75 = 749.14/x
  3. Step 3: Cross multiply
    1,408.18x = 2,107.75 × 749.14
  4. Step 4: Simplify right side
    1,408.18x = 1,578,999.84
  5. Step 5: Solve for x
    x = 1,578,999.84/1,408.18
  6. Step 6: Final answer
    x = 1,121.31

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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.