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Finding the Fourth Proportional to 260.32, 389.30 and 194.48

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Solution

The fourth proportional to 260.32, 389.30 and 194.48 is: 290.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.32 : 389.30 = 194.48 : x
  2. Step 2: Convert to fraction form
    260.32/389.30 = 194.48/x
  3. Step 3: Cross multiply
    260.32x = 389.30 × 194.48
  4. Step 4: Simplify right side
    260.32x = 75,712.04
  5. Step 5: Solve for x
    x = 75,712.04/260.32
  6. Step 6: Final answer
    x = 290.84

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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.