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Finding the Fourth Proportional to 260.34, 390.30 and 130.33

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Solution

The fourth proportional to 260.34, 390.30 and 130.33 is: 195.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.34 : 390.30 = 130.33 : x
  2. Step 2: Convert to fraction form
    260.34/390.30 = 130.33/x
  3. Step 3: Cross multiply
    260.34x = 390.30 × 130.33
  4. Step 4: Simplify right side
    260.34x = 50,867.80
  5. Step 5: Solve for x
    x = 50,867.80/260.34
  6. Step 6: Final answer
    x = 195.39

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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.