Home / 1,090.25-1,635.69-320.75

Finding the Fourth Proportional to 1,090.25, 1,635.69 and 320.75

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Solution

The fourth proportional to 1,090.25, 1,635.69 and 320.75 is: 481.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.25 : 1,635.69 = 320.75 : x
  2. Step 2: Convert to fraction form
    1,090.25/1,635.69 = 320.75/x
  3. Step 3: Cross multiply
    1,090.25x = 1,635.69 × 320.75
  4. Step 4: Simplify right side
    1,090.25x = 524,647.57
  5. Step 5: Solve for x
    x = 524,647.57/1,090.25
  6. Step 6: Final answer
    x = 481.22

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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.