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Finding the Fourth Proportional to 260.16, 359.70 and 198.36

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Solution

The fourth proportional to 260.16, 359.70 and 198.36 is: 274.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.16 : 359.70 = 198.36 : x
  2. Step 2: Convert to fraction form
    260.16/359.70 = 198.36/x
  3. Step 3: Cross multiply
    260.16x = 359.70 × 198.36
  4. Step 4: Simplify right side
    260.16x = 71,350.09
  5. Step 5: Solve for x
    x = 71,350.09/260.16
  6. Step 6: Final answer
    x = 274.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.