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Finding the Fourth Proportional to 260.31, 359.21 and 149.79

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Solution

The fourth proportional to 260.31, 359.21 and 149.79 is: 206.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.31 : 359.21 = 149.79 : x
  2. Step 2: Convert to fraction form
    260.31/359.21 = 149.79/x
  3. Step 3: Cross multiply
    260.31x = 359.21 × 149.79
  4. Step 4: Simplify right side
    260.31x = 53,806.07
  5. Step 5: Solve for x
    x = 53,806.07/260.31
  6. Step 6: Final answer
    x = 206.70

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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.