Home / 2,128.36-3,194.72-1,646.68

Finding the Fourth Proportional to 2,128.36, 3,194.72 and 1,646.68

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Solution

The fourth proportional to 2,128.36, 3,194.72 and 1,646.68 is: 2,471.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.36 : 3,194.72 = 1,646.68 : x
  2. Step 2: Convert to fraction form
    2,128.36/3,194.72 = 1,646.68/x
  3. Step 3: Cross multiply
    2,128.36x = 3,194.72 × 1,646.68
  4. Step 4: Simplify right side
    2,128.36x = 5,260,681.53
  5. Step 5: Solve for x
    x = 5,260,681.53/2,128.36
  6. Step 6: Final answer
    x = 2,471.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.