Home / 3,090.40-4,634.68-1,628.75

Finding the Fourth Proportional to 3,090.40, 4,634.68 and 1,628.75

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Solution

The fourth proportional to 3,090.40, 4,634.68 and 1,628.75 is: 2,442.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,090.40 : 4,634.68 = 1,628.75 : x
  2. Step 2: Convert to fraction form
    3,090.40/4,634.68 = 1,628.75/x
  3. Step 3: Cross multiply
    3,090.40x = 4,634.68 × 1,628.75
  4. Step 4: Simplify right side
    3,090.40x = 7,548,742.56
  5. Step 5: Solve for x
    x = 7,548,742.56/3,090.40
  6. Step 6: Final answer
    x = 2,442.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.