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Finding the Fourth Proportional to 849.26, 1,170.39 and 662.45

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Solution

The fourth proportional to 849.26, 1,170.39 and 662.45 is: 912.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.26 : 1,170.39 = 662.45 : x
  2. Step 2: Convert to fraction form
    849.26/1,170.39 = 662.45/x
  3. Step 3: Cross multiply
    849.26x = 1,170.39 × 662.45
  4. Step 4: Simplify right side
    849.26x = 775,324.86
  5. Step 5: Solve for x
    x = 775,324.86/849.26
  6. Step 6: Final answer
    x = 912.94

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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.