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Finding the Fourth Proportional to 260.40, 359.36 and 149.91

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Solution

The fourth proportional to 260.40, 359.36 and 149.91 is: 206.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.40 : 359.36 = 149.91 : x
  2. Step 2: Convert to fraction form
    260.40/359.36 = 149.91/x
  3. Step 3: Cross multiply
    260.40x = 359.36 × 149.91
  4. Step 4: Simplify right side
    260.40x = 53,870.91
  5. Step 5: Solve for x
    x = 53,870.91/260.40
  6. Step 6: Final answer
    x = 206.88

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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.