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Finding the Fourth Proportional to 260.44, 390.64 and 130.48

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Solution

The fourth proportional to 260.44, 390.64 and 130.48 is: 195.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.44 : 390.64 = 130.48 : x
  2. Step 2: Convert to fraction form
    260.44/390.64 = 130.48/x
  3. Step 3: Cross multiply
    260.44x = 390.64 × 130.48
  4. Step 4: Simplify right side
    260.44x = 50,970.71
  5. Step 5: Solve for x
    x = 50,970.71/260.44
  6. Step 6: Final answer
    x = 195.71

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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.