Home / 1,021.17-1,409.27-579.05

Finding the Fourth Proportional to 1,021.17, 1,409.27 and 579.05

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Solution

The fourth proportional to 1,021.17, 1,409.27 and 579.05 is: 799.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.17 : 1,409.27 = 579.05 : x
  2. Step 2: Convert to fraction form
    1,021.17/1,409.27 = 579.05/x
  3. Step 3: Cross multiply
    1,021.17x = 1,409.27 × 579.05
  4. Step 4: Simplify right side
    1,021.17x = 816,033.14
  5. Step 5: Solve for x
    x = 816,033.14/1,021.17
  6. Step 6: Final answer
    x = 799.11

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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.