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Finding the Fourth Proportional to 260.05, 389.80 and 199.03

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Solution

The fourth proportional to 260.05, 389.80 and 199.03 is: 298.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.05 : 389.80 = 199.03 : x
  2. Step 2: Convert to fraction form
    260.05/389.80 = 199.03/x
  3. Step 3: Cross multiply
    260.05x = 389.80 × 199.03
  4. Step 4: Simplify right side
    260.05x = 77,581.89
  5. Step 5: Solve for x
    x = 77,581.89/260.05
  6. Step 6: Final answer
    x = 298.33

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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.