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Finding the Fourth Proportional to 1,696.37, 2,549.42 and 831.29

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Solution

The fourth proportional to 1,696.37, 2,549.42 and 831.29 is: 1,249.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,696.37 : 2,549.42 = 831.29 : x
  2. Step 2: Convert to fraction form
    1,696.37/2,549.42 = 831.29/x
  3. Step 3: Cross multiply
    1,696.37x = 2,549.42 × 831.29
  4. Step 4: Simplify right side
    1,696.37x = 2,119,290.45
  5. Step 5: Solve for x
    x = 2,119,290.45/1,696.37
  6. Step 6: Final answer
    x = 1,249.31

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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.