Home / 1,985.09-2,739.44-1,145.83

Finding the Fourth Proportional to 1,985.09, 2,739.44 and 1,145.83

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Solution

The fourth proportional to 1,985.09, 2,739.44 and 1,145.83 is: 1,581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.09 : 2,739.44 = 1,145.83 : x
  2. Step 2: Convert to fraction form
    1,985.09/2,739.44 = 1,145.83/x
  3. Step 3: Cross multiply
    1,985.09x = 2,739.44 × 1,145.83
  4. Step 4: Simplify right side
    1,985.09x = 3,138,932.54
  5. Step 5: Solve for x
    x = 3,138,932.54/1,985.09
  6. Step 6: Final answer
    x = 1,581.25

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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.