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Finding the Fourth Proportional to 298.75, 412.28 and 195.25

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Solution

The fourth proportional to 298.75, 412.28 and 195.25 is: 269.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.75 : 412.28 = 195.25 : x
  2. Step 2: Convert to fraction form
    298.75/412.28 = 195.25/x
  3. Step 3: Cross multiply
    298.75x = 412.28 × 195.25
  4. Step 4: Simplify right side
    298.75x = 80,497.67
  5. Step 5: Solve for x
    x = 80,497.67/298.75
  6. Step 6: Final answer
    x = 269.45

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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.