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Finding the Fourth Proportional to 2,668.53, 3,682.73 and 1,489.61

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Solution

The fourth proportional to 2,668.53, 3,682.73 and 1,489.61 is: 2,055.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.53 : 3,682.73 = 1,489.61 : x
  2. Step 2: Convert to fraction form
    2,668.53/3,682.73 = 1,489.61/x
  3. Step 3: Cross multiply
    2,668.53x = 3,682.73 × 1,489.61
  4. Step 4: Simplify right side
    2,668.53x = 5,485,831.44
  5. Step 5: Solve for x
    x = 5,485,831.44/2,668.53
  6. Step 6: Final answer
    x = 2,055.75

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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.