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Finding the Fourth Proportional to 2,668.38, 3,682.20 and 1,489.50

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Solution

The fourth proportional to 2,668.38, 3,682.20 and 1,489.50 is: 2,055.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.38 : 3,682.20 = 1,489.50 : x
  2. Step 2: Convert to fraction form
    2,668.38/3,682.20 = 1,489.50/x
  3. Step 3: Cross multiply
    2,668.38x = 3,682.20 × 1,489.50
  4. Step 4: Simplify right side
    2,668.38x = 5,484,636.90
  5. Step 5: Solve for x
    x = 5,484,636.90/2,668.38
  6. Step 6: Final answer
    x = 2,055.42

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1.5x scale

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.