Home / 2,120.79-2,926.37-1,236.43

Finding the Fourth Proportional to 2,120.79, 2,926.37 and 1,236.43

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Solution

The fourth proportional to 2,120.79, 2,926.37 and 1,236.43 is: 1,706.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.79 : 2,926.37 = 1,236.43 : x
  2. Step 2: Convert to fraction form
    2,120.79/2,926.37 = 1,236.43/x
  3. Step 3: Cross multiply
    2,120.79x = 2,926.37 × 1,236.43
  4. Step 4: Simplify right side
    2,120.79x = 3,618,247.43
  5. Step 5: Solve for x
    x = 3,618,247.43/2,120.79
  6. Step 6: Final answer
    x = 1,706.08

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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.