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Finding the Fourth Proportional to 2,668.96, 4,000.74 and 1,280.26

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Solution

The fourth proportional to 2,668.96, 4,000.74 and 1,280.26 is: 1,919.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.96 : 4,000.74 = 1,280.26 : x
  2. Step 2: Convert to fraction form
    2,668.96/4,000.74 = 1,280.26/x
  3. Step 3: Cross multiply
    2,668.96x = 4,000.74 × 1,280.26
  4. Step 4: Simplify right side
    2,668.96x = 5,121,987.39
  5. Step 5: Solve for x
    x = 5,121,987.39/2,668.96
  6. Step 6: Final answer
    x = 1,919.09

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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.