Home / 2,807.60-4,211.40-2,289.20

Finding the Fourth Proportional to 2,807.60, 4,211.40 and 2,289.20

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Solution

The fourth proportional to 2,807.60, 4,211.40 and 2,289.20 is: 3,433.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.60 : 4,211.40 = 2,289.20 : x
  2. Step 2: Convert to fraction form
    2,807.60/4,211.40 = 2,289.20/x
  3. Step 3: Cross multiply
    2,807.60x = 4,211.40 × 2,289.20
  4. Step 4: Simplify right side
    2,807.60x = 9,640,736.88
  5. Step 5: Solve for x
    x = 9,640,736.88/2,807.60
  6. Step 6: Final answer
    x = 3,433.80

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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.