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Finding the Fourth Proportional to 393.23, 589.84 and 119.33

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Solution

The fourth proportional to 393.23, 589.84 and 119.33 is: 178.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.23 : 589.84 = 119.33 : x
  2. Step 2: Convert to fraction form
    393.23/589.84 = 119.33/x
  3. Step 3: Cross multiply
    393.23x = 589.84 × 119.33
  4. Step 4: Simplify right side
    393.23x = 70,382.36
  5. Step 5: Solve for x
    x = 70,382.36/393.23
  6. Step 6: Final answer
    x = 178.98

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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.