Home / 1,984.20-2,738.10-1,145.05

Finding the Fourth Proportional to 1,984.20, 2,738.10 and 1,145.05

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Solution

The fourth proportional to 1,984.20, 2,738.10 and 1,145.05 is: 1,580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.20 : 2,738.10 = 1,145.05 : x
  2. Step 2: Convert to fraction form
    1,984.20/2,738.10 = 1,145.05/x
  3. Step 3: Cross multiply
    1,984.20x = 2,738.10 × 1,145.05
  4. Step 4: Simplify right side
    1,984.20x = 3,135,261.41
  5. Step 5: Solve for x
    x = 3,135,261.41/1,984.20
  6. Step 6: Final answer
    x = 1,580.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.