Home / 2,120.66-2,926.78-1,189.34

Finding the Fourth Proportional to 2,120.66, 2,926.78 and 1,189.34

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Solution

The fourth proportional to 2,120.66, 2,926.78 and 1,189.34 is: 1,641.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.66 : 2,926.78 = 1,189.34 : x
  2. Step 2: Convert to fraction form
    2,120.66/2,926.78 = 1,189.34/x
  3. Step 3: Cross multiply
    2,120.66x = 2,926.78 × 1,189.34
  4. Step 4: Simplify right side
    2,120.66x = 3,480,918.92
  5. Step 5: Solve for x
    x = 3,480,918.92/2,120.66
  6. Step 6: Final answer
    x = 1,641.44

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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.