Home / 1,021.25-1,409.32-579.24

Finding the Fourth Proportional to 1,021.25, 1,409.32 and 579.24

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Solution

The fourth proportional to 1,021.25, 1,409.32 and 579.24 is: 799.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.25 : 1,409.32 = 579.24 : x
  2. Step 2: Convert to fraction form
    1,021.25/1,409.32 = 579.24/x
  3. Step 3: Cross multiply
    1,021.25x = 1,409.32 × 579.24
  4. Step 4: Simplify right side
    1,021.25x = 816,335.24
  5. Step 5: Solve for x
    x = 816,335.24/1,021.25
  6. Step 6: Final answer
    x = 799.35

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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.