Home / 3,408.48-5,111.88-1,328.76

Finding the Fourth Proportional to 3,408.48, 5,111.88 and 1,328.76

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Solution

The fourth proportional to 3,408.48, 5,111.88 and 1,328.76 is: 1,992.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.48 : 5,111.88 = 1,328.76 : x
  2. Step 2: Convert to fraction form
    3,408.48/5,111.88 = 1,328.76/x
  3. Step 3: Cross multiply
    3,408.48x = 5,111.88 × 1,328.76
  4. Step 4: Simplify right side
    3,408.48x = 6,792,461.67
  5. Step 5: Solve for x
    x = 6,792,461.67/3,408.48
  6. Step 6: Final answer
    x = 1,992.81

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1.5x scale

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.