Home / 1,394.23-2,091.30-664.33

Finding the Fourth Proportional to 1,394.23, 2,091.30 and 664.33

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Solution

The fourth proportional to 1,394.23, 2,091.30 and 664.33 is: 996.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.23 : 2,091.30 = 664.33 : x
  2. Step 2: Convert to fraction form
    1,394.23/2,091.30 = 664.33/x
  3. Step 3: Cross multiply
    1,394.23x = 2,091.30 × 664.33
  4. Step 4: Simplify right side
    1,394.23x = 1,389,313.33
  5. Step 5: Solve for x
    x = 1,389,313.33/1,394.23
  6. Step 6: Final answer
    x = 996.47

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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.