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Finding the Fourth Proportional to 849.38, 1,171.94 and 518.00

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Solution

The fourth proportional to 849.38, 1,171.94 and 518.00 is: 714.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.38 : 1,171.94 = 518.00 : x
  2. Step 2: Convert to fraction form
    849.38/1,171.94 = 518.00/x
  3. Step 3: Cross multiply
    849.38x = 1,171.94 × 518.00
  4. Step 4: Simplify right side
    849.38x = 607,056.47
  5. Step 5: Solve for x
    x = 607,056.47/849.38
  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.