Home / 2,189.56-3,289.20-1,868.80

Finding the Fourth Proportional to 2,189.56, 3,289.20 and 1,868.80

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Solution

The fourth proportional to 2,189.56, 3,289.20 and 1,868.80 is: 2,807.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.56 : 3,289.20 = 1,868.80 : x
  2. Step 2: Convert to fraction form
    2,189.56/3,289.20 = 1,868.80/x
  3. Step 3: Cross multiply
    2,189.56x = 3,289.20 × 1,868.80
  4. Step 4: Simplify right side
    2,189.56x = 6,146,856.96
  5. Step 5: Solve for x
    x = 6,146,856.96/2,189.56
  6. Step 6: Final answer
    x = 2,807.35

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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.