Home / 2,785.03-3,840.68-1,665.78

Finding the Fourth Proportional to 2,785.03, 3,840.68 and 1,665.78

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Solution

The fourth proportional to 2,785.03, 3,840.68 and 1,665.78 is: 2,297.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.03 : 3,840.68 = 1,665.78 : x
  2. Step 2: Convert to fraction form
    2,785.03/3,840.68 = 1,665.78/x
  3. Step 3: Cross multiply
    2,785.03x = 3,840.68 × 1,665.78
  4. Step 4: Simplify right side
    2,785.03x = 6,397,739.30
  5. Step 5: Solve for x
    x = 6,397,739.30/2,785.03
  6. Step 6: Final answer
    x = 2,297.19

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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.