Home / 1,984.95-2,739.35-1,145.80

Finding the Fourth Proportional to 1,984.95, 2,739.35 and 1,145.80

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Solution

The fourth proportional to 1,984.95, 2,739.35 and 1,145.80 is: 1,581.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.95 : 2,739.35 = 1,145.80 : x
  2. Step 2: Convert to fraction form
    1,984.95/2,739.35 = 1,145.80/x
  3. Step 3: Cross multiply
    1,984.95x = 2,739.35 × 1,145.80
  4. Step 4: Simplify right side
    1,984.95x = 3,138,747.23
  5. Step 5: Solve for x
    x = 3,138,747.23/1,984.95
  6. Step 6: Final answer
    x = 1,581.27

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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.