Home / 3,111.40-4,664.77-1,878.55

Finding the Fourth Proportional to 3,111.40, 4,664.77 and 1,878.55

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Solution

The fourth proportional to 3,111.40, 4,664.77 and 1,878.55 is: 2,816.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.40 : 4,664.77 = 1,878.55 : x
  2. Step 2: Convert to fraction form
    3,111.40/4,664.77 = 1,878.55/x
  3. Step 3: Cross multiply
    3,111.40x = 4,664.77 × 1,878.55
  4. Step 4: Simplify right side
    3,111.40x = 8,763,003.68
  5. Step 5: Solve for x
    x = 8,763,003.68/3,111.40
  6. Step 6: Final answer
    x = 2,816.42

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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.