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Finding the Fourth Proportional to 2,668.80, 3,682.80 and 1,673.76

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Solution

The fourth proportional to 2,668.80, 3,682.80 and 1,673.76 is: 2,309.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.80 : 3,682.80 = 1,673.76 : x
  2. Step 2: Convert to fraction form
    2,668.80/3,682.80 = 1,673.76/x
  3. Step 3: Cross multiply
    2,668.80x = 3,682.80 × 1,673.76
  4. Step 4: Simplify right side
    2,668.80x = 6,164,123.33
  5. Step 5: Solve for x
    x = 6,164,123.33/2,668.80
  6. Step 6: Final answer
    x = 2,309.70

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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.