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Finding the Fourth Proportional to 849.62, 1,172.23 and 518.02

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Solution

The fourth proportional to 849.62, 1,172.23 and 518.02 is: 714.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.62 : 1,172.23 = 518.02 : x
  2. Step 2: Convert to fraction form
    849.62/1,172.23 = 518.02/x
  3. Step 3: Cross multiply
    849.62x = 1,172.23 × 518.02
  4. Step 4: Simplify right side
    849.62x = 607,234.36
  5. Step 5: Solve for x
    x = 607,234.36/849.62
  6. Step 6: Final answer
    x = 714.71

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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.