Home / 1,090.12-1,634.94-320.44

Finding the Fourth Proportional to 1,090.12, 1,634.94 and 320.44

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Solution

The fourth proportional to 1,090.12, 1,634.94 and 320.44 is: 480.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.12 : 1,634.94 = 320.44 : x
  2. Step 2: Convert to fraction form
    1,090.12/1,634.94 = 320.44/x
  3. Step 3: Cross multiply
    1,090.12x = 1,634.94 × 320.44
  4. Step 4: Simplify right side
    1,090.12x = 523,900.17
  5. Step 5: Solve for x
    x = 523,900.17/1,090.12
  6. Step 6: Final answer
    x = 480.59

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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.