Home / 2,129.92-2,939.19-1,185.29

Finding the Fourth Proportional to 2,129.92, 2,939.19 and 1,185.29

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Solution

The fourth proportional to 2,129.92, 2,939.19 and 1,185.29 is: 1,635.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.92 : 2,939.19 = 1,185.29 : x
  2. Step 2: Convert to fraction form
    2,129.92/2,939.19 = 1,185.29/x
  3. Step 3: Cross multiply
    2,129.92x = 2,939.19 × 1,185.29
  4. Step 4: Simplify right side
    2,129.92x = 3,483,777.82
  5. Step 5: Solve for x
    x = 3,483,777.82/2,129.92
  6. Step 6: Final answer
    x = 1,635.64

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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.