Home / 3,515.89-5,266.78-1,668.80

Finding the Fourth Proportional to 3,515.89, 5,266.78 and 1,668.80

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Solution

The fourth proportional to 3,515.89, 5,266.78 and 1,668.80 is: 2,499.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515.89 : 5,266.78 = 1,668.80 : x
  2. Step 2: Convert to fraction form
    3,515.89/5,266.78 = 1,668.80/x
  3. Step 3: Cross multiply
    3,515.89x = 5,266.78 × 1,668.80
  4. Step 4: Simplify right side
    3,515.89x = 8,789,171.96
  5. Step 5: Solve for x
    x = 8,789,171.96/3,515.89
  6. Step 6: Final answer
    x = 2,499.84

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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.