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Finding the Fourth Proportional to 260.88, 390.84 and 192.03

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Solution

The fourth proportional to 260.88, 390.84 and 192.03 is: 287.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.88 : 390.84 = 192.03 : x
  2. Step 2: Convert to fraction form
    260.88/390.84 = 192.03/x
  3. Step 3: Cross multiply
    260.88x = 390.84 × 192.03
  4. Step 4: Simplify right side
    260.88x = 75,053.01
  5. Step 5: Solve for x
    x = 75,053.01/260.88
  6. Step 6: Final answer
    x = 287.69

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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.