Home / 1,021.20-1,531.88-327.96

Finding the Fourth Proportional to 1,021.20, 1,531.88 and 327.96

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Solution

The fourth proportional to 1,021.20, 1,531.88 and 327.96 is: 491.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.20 : 1,531.88 = 327.96 : x
  2. Step 2: Convert to fraction form
    1,021.20/1,531.88 = 327.96/x
  3. Step 3: Cross multiply
    1,021.20x = 1,531.88 × 327.96
  4. Step 4: Simplify right side
    1,021.20x = 502,395.36
  5. Step 5: Solve for x
    x = 502,395.36/1,021.20
  6. Step 6: Final answer
    x = 491.97

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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.