Home / 1,336.80-1,991.49-1,276.84

Finding the Fourth Proportional to 1,336.80, 1,991.49 and 1,276.84

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Solution

The fourth proportional to 1,336.80, 1,991.49 and 1,276.84 is: 1,902.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.80 : 1,991.49 = 1,276.84 : x
  2. Step 2: Convert to fraction form
    1,336.80/1,991.49 = 1,276.84/x
  3. Step 3: Cross multiply
    1,336.80x = 1,991.49 × 1,276.84
  4. Step 4: Simplify right side
    1,336.80x = 2,542,811.79
  5. Step 5: Solve for x
    x = 2,542,811.79/1,336.80
  6. Step 6: Final answer
    x = 1,902.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.