Home / 2,790.42-3,850.64-1,670.69

Finding the Fourth Proportional to 2,790.42, 3,850.64 and 1,670.69

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Solution

The fourth proportional to 2,790.42, 3,850.64 and 1,670.69 is: 2,305.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.42 : 3,850.64 = 1,670.69 : x
  2. Step 2: Convert to fraction form
    2,790.42/3,850.64 = 1,670.69/x
  3. Step 3: Cross multiply
    2,790.42x = 3,850.64 × 1,670.69
  4. Step 4: Simplify right side
    2,790.42x = 6,433,198.13
  5. Step 5: Solve for x
    x = 6,433,198.13/2,790.42
  6. Step 6: Final answer
    x = 2,305.46

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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.