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Finding the Fourth Proportional to 849.69, 1,172.37 and 550.38

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Solution

The fourth proportional to 849.69, 1,172.37 and 550.38 is: 759.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.69 : 1,172.37 = 550.38 : x
  2. Step 2: Convert to fraction form
    849.69/1,172.37 = 550.38/x
  3. Step 3: Cross multiply
    849.69x = 1,172.37 × 550.38
  4. Step 4: Simplify right side
    849.69x = 645,249.00
  5. Step 5: Solve for x
    x = 645,249.00/849.69
  6. Step 6: Final answer
    x = 759.39

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1.5x scale

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.