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Finding the Fourth Proportional to 835.62, 1,153.26 and 660.66

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Solution

The fourth proportional to 835.62, 1,153.26 and 660.66 is: 911.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.62 : 1,153.26 = 660.66 : x
  2. Step 2: Convert to fraction form
    835.62/1,153.26 = 660.66/x
  3. Step 3: Cross multiply
    835.62x = 1,153.26 × 660.66
  4. Step 4: Simplify right side
    835.62x = 761,912.75
  5. Step 5: Solve for x
    x = 761,912.75/835.62
  6. Step 6: Final answer
    x = 911.79

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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.