Home / 2,921.51-4,033.92-1,928.20

Finding the Fourth Proportional to 2,921.51, 4,033.92 and 1,928.20

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Solution

The fourth proportional to 2,921.51, 4,033.92 and 1,928.20 is: 2,662.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.51 : 4,033.92 = 1,928.20 : x
  2. Step 2: Convert to fraction form
    2,921.51/4,033.92 = 1,928.20/x
  3. Step 3: Cross multiply
    2,921.51x = 4,033.92 × 1,928.20
  4. Step 4: Simplify right side
    2,921.51x = 7,778,204.54
  5. Step 5: Solve for x
    x = 7,778,204.54/2,921.51
  6. Step 6: Final answer
    x = 2,662.39

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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.