Home / 2,847.96-3,930.42-1,668.78

Finding the Fourth Proportional to 2,847.96, 3,930.42 and 1,668.78

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Solution

The fourth proportional to 2,847.96, 3,930.42 and 1,668.78 is: 2,303.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.96 : 3,930.42 = 1,668.78 : x
  2. Step 2: Convert to fraction form
    2,847.96/3,930.42 = 1,668.78/x
  3. Step 3: Cross multiply
    2,847.96x = 3,930.42 × 1,668.78
  4. Step 4: Simplify right side
    2,847.96x = 6,559,006.29
  5. Step 5: Solve for x
    x = 6,559,006.29/2,847.96
  6. Step 6: Final answer
    x = 2,303.05

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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.