Home / 1,811.40-2,711.70-1,080.60

Finding the Fourth Proportional to 1,811.40, 2,711.70 and 1,080.60

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Solution

The fourth proportional to 1,811.40, 2,711.70 and 1,080.60 is: 1,617.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.40 : 2,711.70 = 1,080.60 : x
  2. Step 2: Convert to fraction form
    1,811.40/2,711.70 = 1,080.60/x
  3. Step 3: Cross multiply
    1,811.40x = 2,711.70 × 1,080.60
  4. Step 4: Simplify right side
    1,811.40x = 2,930,263.02
  5. Step 5: Solve for x
    x = 2,930,263.02/1,811.40
  6. Step 6: Final answer
    x = 1,617.68

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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.