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Finding the Fourth Proportional to 608.19, 911.67 and 261.75

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Solution

The fourth proportional to 608.19, 911.67 and 261.75 is: 392.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.19 : 911.67 = 261.75 : x
  2. Step 2: Convert to fraction form
    608.19/911.67 = 261.75/x
  3. Step 3: Cross multiply
    608.19x = 911.67 × 261.75
  4. Step 4: Simplify right side
    608.19x = 238,629.62
  5. Step 5: Solve for x
    x = 238,629.62/608.19
  6. Step 6: Final answer
    x = 392.36

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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.