Home / 2,159.84-3,241.20-1,120.80

Finding the Fourth Proportional to 2,159.84, 3,241.20 and 1,120.80

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Solution

The fourth proportional to 2,159.84, 3,241.20 and 1,120.80 is: 1,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.84 : 3,241.20 = 1,120.80 : x
  2. Step 2: Convert to fraction form
    2,159.84/3,241.20 = 1,120.80/x
  3. Step 3: Cross multiply
    2,159.84x = 3,241.20 × 1,120.80
  4. Step 4: Simplify right side
    2,159.84x = 3,632,736.96
  5. Step 5: Solve for x
    x = 3,632,736.96/2,159.84
  6. Step 6: Final answer
    x = 1,681.95

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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.