Home / 3,409.86-5,112.02-1,328.80

Finding the Fourth Proportional to 3,409.86, 5,112.02 and 1,328.80

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Solution

The fourth proportional to 3,409.86, 5,112.02 and 1,328.80 is: 1,992.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.86 : 5,112.02 = 1,328.80 : x
  2. Step 2: Convert to fraction form
    3,409.86/5,112.02 = 1,328.80/x
  3. Step 3: Cross multiply
    3,409.86x = 5,112.02 × 1,328.80
  4. Step 4: Simplify right side
    3,409.86x = 6,792,852.18
  5. Step 5: Solve for x
    x = 6,792,852.18/3,409.86
  6. Step 6: Final answer
    x = 1,992.12

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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.