Home / 1,353.12-2,029.68-327.12

Finding the Fourth Proportional to 1,353.12, 2,029.68 and 327.12

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Solution

The fourth proportional to 1,353.12, 2,029.68 and 327.12 is: 490.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.12 : 2,029.68 = 327.12 : x
  2. Step 2: Convert to fraction form
    1,353.12/2,029.68 = 327.12/x
  3. Step 3: Cross multiply
    1,353.12x = 2,029.68 × 327.12
  4. Step 4: Simplify right side
    1,353.12x = 663,948.92
  5. Step 5: Solve for x
    x = 663,948.92/1,353.12
  6. Step 6: Final answer
    x = 490.68

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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.