Home / 1,090.32-1,635.36-320.80

Finding the Fourth Proportional to 1,090.32, 1,635.36 and 320.80

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Solution

The fourth proportional to 1,090.32, 1,635.36 and 320.80 is: 481.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.32 : 1,635.36 = 320.80 : x
  2. Step 2: Convert to fraction form
    1,090.32/1,635.36 = 320.80/x
  3. Step 3: Cross multiply
    1,090.32x = 1,635.36 × 320.80
  4. Step 4: Simplify right side
    1,090.32x = 524,623.49
  5. Step 5: Solve for x
    x = 524,623.49/1,090.32
  6. Step 6: Final answer
    x = 481.16

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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.