Home / 2,313.21-3,192.83-1,428.51

Finding the Fourth Proportional to 2,313.21, 3,192.83 and 1,428.51

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Solution

The fourth proportional to 2,313.21, 3,192.83 and 1,428.51 is: 1,971.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.21 : 3,192.83 = 1,428.51 : x
  2. Step 2: Convert to fraction form
    2,313.21/3,192.83 = 1,428.51/x
  3. Step 3: Cross multiply
    2,313.21x = 3,192.83 × 1,428.51
  4. Step 4: Simplify right side
    2,313.21x = 4,560,982.44
  5. Step 5: Solve for x
    x = 4,560,982.44/2,313.21
  6. Step 6: Final answer
    x = 1,971.71

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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.