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Finding the Fourth Proportional to 849.44, 1,272.33 and 415.69

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Solution

The fourth proportional to 849.44, 1,272.33 and 415.69 is: 622.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.44 : 1,272.33 = 415.69 : x
  2. Step 2: Convert to fraction form
    849.44/1,272.33 = 415.69/x
  3. Step 3: Cross multiply
    849.44x = 1,272.33 × 415.69
  4. Step 4: Simplify right side
    849.44x = 528,891.68
  5. Step 5: Solve for x
    x = 528,891.68/849.44
  6. Step 6: Final answer
    x = 622.63

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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.