Home / 2,081.49-3,122.36-620.79

Finding the Fourth Proportional to 2,081.49, 3,122.36 and 620.79

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Solution

The fourth proportional to 2,081.49, 3,122.36 and 620.79 is: 931.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.49 : 3,122.36 = 620.79 : x
  2. Step 2: Convert to fraction form
    2,081.49/3,122.36 = 620.79/x
  3. Step 3: Cross multiply
    2,081.49x = 3,122.36 × 620.79
  4. Step 4: Simplify right side
    2,081.49x = 1,938,329.86
  5. Step 5: Solve for x
    x = 1,938,329.86/2,081.49
  6. Step 6: Final answer
    x = 931.22

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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.