Home / 3,116.80-4,664.40-2,857.60

Finding the Fourth Proportional to 3,116.80, 4,664.40 and 2,857.60

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Solution

The fourth proportional to 3,116.80, 4,664.40 and 2,857.60 is: 4,276.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.80 : 4,664.40 = 2,857.60 : x
  2. Step 2: Convert to fraction form
    3,116.80/4,664.40 = 2,857.60/x
  3. Step 3: Cross multiply
    3,116.80x = 4,664.40 × 2,857.60
  4. Step 4: Simplify right side
    3,116.80x = 13,328,989.44
  5. Step 5: Solve for x
    x = 13,328,989.44/3,116.80
  6. Step 6: Final answer
    x = 4,276.50

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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.