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Finding the Fourth Proportional to 260.25, 390.53 and 115.97

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Solution

The fourth proportional to 260.25, 390.53 and 115.97 is: 174.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.25 : 390.53 = 115.97 : x
  2. Step 2: Convert to fraction form
    260.25/390.53 = 115.97/x
  3. Step 3: Cross multiply
    260.25x = 390.53 × 115.97
  4. Step 4: Simplify right side
    260.25x = 45,289.76
  5. Step 5: Solve for x
    x = 45,289.76/260.25
  6. Step 6: Final answer
    x = 174.02

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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.