Home / 1,021.41-1,409.63-579.33

Finding the Fourth Proportional to 1,021.41, 1,409.63 and 579.33

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Solution

The fourth proportional to 1,021.41, 1,409.63 and 579.33 is: 799.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.41 : 1,409.63 = 579.33 : x
  2. Step 2: Convert to fraction form
    1,021.41/1,409.63 = 579.33/x
  3. Step 3: Cross multiply
    1,021.41x = 1,409.63 × 579.33
  4. Step 4: Simplify right side
    1,021.41x = 816,638.05
  5. Step 5: Solve for x
    x = 816,638.05/1,021.41
  6. Step 6: Final answer
    x = 799.52

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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.