Home / 1,021.40-1,409.36-579.27

Finding the Fourth Proportional to 1,021.40, 1,409.36 and 579.27

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Solution

The fourth proportional to 1,021.40, 1,409.36 and 579.27 is: 799.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.40 : 1,409.36 = 579.27 : x
  2. Step 2: Convert to fraction form
    1,021.40/1,409.36 = 579.27/x
  3. Step 3: Cross multiply
    1,021.40x = 1,409.36 × 579.27
  4. Step 4: Simplify right side
    1,021.40x = 816,399.97
  5. Step 5: Solve for x
    x = 816,399.97/1,021.40
  6. Step 6: Final answer
    x = 799.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.