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Finding the Fourth Proportional to 849.49, 1,172.78 and 584.31

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Solution

The fourth proportional to 849.49, 1,172.78 and 584.31 is: 806.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.49 : 1,172.78 = 584.31 : x
  2. Step 2: Convert to fraction form
    849.49/1,172.78 = 584.31/x
  3. Step 3: Cross multiply
    849.49x = 1,172.78 × 584.31
  4. Step 4: Simplify right side
    849.49x = 685,270.75
  5. Step 5: Solve for x
    x = 685,270.75/849.49
  6. Step 6: Final answer
    x = 806.69

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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.