Home / 2,193.60-3,290.40-2,161.20

Finding the Fourth Proportional to 2,193.60, 3,290.40 and 2,161.20

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Solution

The fourth proportional to 2,193.60, 3,290.40 and 2,161.20 is: 3,241.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,193.60 : 3,290.40 = 2,161.20 : x
  2. Step 2: Convert to fraction form
    2,193.60/3,290.40 = 2,161.20/x
  3. Step 3: Cross multiply
    2,193.60x = 3,290.40 × 2,161.20
  4. Step 4: Simplify right side
    2,193.60x = 7,111,212.48
  5. Step 5: Solve for x
    x = 7,111,212.48/2,193.60
  6. Step 6: Final answer
    x = 3,241.80

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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.