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Finding the Fourth Proportional to 260.91, 390.60 and 200.75

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Solution

The fourth proportional to 260.91, 390.60 and 200.75 is: 300.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.91 : 390.60 = 200.75 : x
  2. Step 2: Convert to fraction form
    260.91/390.60 = 200.75/x
  3. Step 3: Cross multiply
    260.91x = 390.60 × 200.75
  4. Step 4: Simplify right side
    260.91x = 78,411.00
  5. Step 5: Solve for x
    x = 78,411.00/260.91
  6. Step 6: Final answer
    x = 300.53

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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.