Home / 2,139.16-3,208.96-579.17

Finding the Fourth Proportional to 2,139.16, 3,208.96 and 579.17

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Solution

The fourth proportional to 2,139.16, 3,208.96 and 579.17 is: 868.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.16 : 3,208.96 = 579.17 : x
  2. Step 2: Convert to fraction form
    2,139.16/3,208.96 = 579.17/x
  3. Step 3: Cross multiply
    2,139.16x = 3,208.96 × 579.17
  4. Step 4: Simplify right side
    2,139.16x = 1,858,533.36
  5. Step 5: Solve for x
    x = 1,858,533.36/2,139.16
  6. Step 6: Final answer
    x = 868.82

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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.