Home / 2,181.20-3,271.80-1,360.40

Finding the Fourth Proportional to 2,181.20, 3,271.80 and 1,360.40

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Solution

The fourth proportional to 2,181.20, 3,271.80 and 1,360.40 is: 2,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.20 : 3,271.80 = 1,360.40 : x
  2. Step 2: Convert to fraction form
    2,181.20/3,271.80 = 1,360.40/x
  3. Step 3: Cross multiply
    2,181.20x = 3,271.80 × 1,360.40
  4. Step 4: Simplify right side
    2,181.20x = 4,450,956.72
  5. Step 5: Solve for x
    x = 4,450,956.72/2,181.20
  6. Step 6: Final answer
    x = 2,040.60

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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.