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Finding the Fourth Proportional to 2,668.05, 3,998.49 and 1,928.94

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Solution

The fourth proportional to 2,668.05, 3,998.49 and 1,928.94 is: 2,890.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.05 : 3,998.49 = 1,928.94 : x
  2. Step 2: Convert to fraction form
    2,668.05/3,998.49 = 1,928.94/x
  3. Step 3: Cross multiply
    2,668.05x = 3,998.49 × 1,928.94
  4. Step 4: Simplify right side
    2,668.05x = 7,712,847.30
  5. Step 5: Solve for x
    x = 7,712,847.30/2,668.05
  6. Step 6: Final answer
    x = 2,890.82

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1.5x scale

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.