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Finding the Fourth Proportional to 849.29, 1,270.89 and 665.42

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Solution

The fourth proportional to 849.29, 1,270.89 and 665.42 is: 995.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.29 : 1,270.89 = 665.42 : x
  2. Step 2: Convert to fraction form
    849.29/1,270.89 = 665.42/x
  3. Step 3: Cross multiply
    849.29x = 1,270.89 × 665.42
  4. Step 4: Simplify right side
    849.29x = 845,669.27
  5. Step 5: Solve for x
    x = 845,669.27/849.29
  6. Step 6: Final answer
    x = 995.74

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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.