Home / 2,220.40-3,330.60-1,394.20

Finding the Fourth Proportional to 2,220.40, 3,330.60 and 1,394.20

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Solution

The fourth proportional to 2,220.40, 3,330.60 and 1,394.20 is: 2,091.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.40 : 3,330.60 = 1,394.20 : x
  2. Step 2: Convert to fraction form
    2,220.40/3,330.60 = 1,394.20/x
  3. Step 3: Cross multiply
    2,220.40x = 3,330.60 × 1,394.20
  4. Step 4: Simplify right side
    2,220.40x = 4,643,522.52
  5. Step 5: Solve for x
    x = 4,643,522.52/2,220.40
  6. Step 6: Final answer
    x = 2,091.30

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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.