Home / 2,160.39-3,240.21-579.12

Finding the Fourth Proportional to 2,160.39, 3,240.21 and 579.12

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Solution

The fourth proportional to 2,160.39, 3,240.21 and 579.12 is: 868.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.39 : 3,240.21 = 579.12 : x
  2. Step 2: Convert to fraction form
    2,160.39/3,240.21 = 579.12/x
  3. Step 3: Cross multiply
    2,160.39x = 3,240.21 × 579.12
  4. Step 4: Simplify right side
    2,160.39x = 1,876,470.42
  5. Step 5: Solve for x
    x = 1,876,470.42/2,160.39
  6. Step 6: Final answer
    x = 868.58

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1.5x scale

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.