Home / 1,086.92-1,629.80-393.23

Finding the Fourth Proportional to 1,086.92, 1,629.80 and 393.23

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Solution

The fourth proportional to 1,086.92, 1,629.80 and 393.23 is: 589.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.92 : 1,629.80 = 393.23 : x
  2. Step 2: Convert to fraction form
    1,086.92/1,629.80 = 393.23/x
  3. Step 3: Cross multiply
    1,086.92x = 1,629.80 × 393.23
  4. Step 4: Simplify right side
    1,086.92x = 640,876.14
  5. Step 5: Solve for x
    x = 640,876.14/1,086.92
  6. Step 6: Final answer
    x = 589.63

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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.