Home / 3,608.10-5,408.43-1,386.40

Finding the Fourth Proportional to 3,608.10, 5,408.43 and 1,386.40

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Solution

The fourth proportional to 3,608.10, 5,408.43 and 1,386.40 is: 2,078.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.10 : 5,408.43 = 1,386.40 : x
  2. Step 2: Convert to fraction form
    3,608.10/5,408.43 = 1,386.40/x
  3. Step 3: Cross multiply
    3,608.10x = 5,408.43 × 1,386.40
  4. Step 4: Simplify right side
    3,608.10x = 7,498,247.35
  5. Step 5: Solve for x
    x = 7,498,247.35/3,608.10
  6. Step 6: Final answer
    x = 2,078.17

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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.