Home / 2,130.26-2,939.74-1,198.76

Finding the Fourth Proportional to 2,130.26, 2,939.74 and 1,198.76

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Solution

The fourth proportional to 2,130.26, 2,939.74 and 1,198.76 is: 1,654.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.26 : 2,939.74 = 1,198.76 : x
  2. Step 2: Convert to fraction form
    2,130.26/2,939.74 = 1,198.76/x
  3. Step 3: Cross multiply
    2,130.26x = 2,939.74 × 1,198.76
  4. Step 4: Simplify right side
    2,130.26x = 3,524,042.72
  5. Step 5: Solve for x
    x = 3,524,042.72/2,130.26
  6. Step 6: Final answer
    x = 1,654.28

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Half scale
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Double scale
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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.