Home / 2,921.56-4,383.51-1,189.78

Finding the Fourth Proportional to 2,921.56, 4,383.51 and 1,189.78

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Solution

The fourth proportional to 2,921.56, 4,383.51 and 1,189.78 is: 1,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.56 : 4,383.51 = 1,189.78 : x
  2. Step 2: Convert to fraction form
    2,921.56/4,383.51 = 1,189.78/x
  3. Step 3: Cross multiply
    2,921.56x = 4,383.51 × 1,189.78
  4. Step 4: Simplify right side
    2,921.56x = 5,215,412.53
  5. Step 5: Solve for x
    x = 5,215,412.53/2,921.56
  6. Step 6: Final answer
    x = 1,785.15

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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.