Home / 2,081.40-3,122.10-620.58

Finding the Fourth Proportional to 2,081.40, 3,122.10 and 620.58

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Solution

The fourth proportional to 2,081.40, 3,122.10 and 620.58 is: 930.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.40 : 3,122.10 = 620.58 : x
  2. Step 2: Convert to fraction form
    2,081.40/3,122.10 = 620.58/x
  3. Step 3: Cross multiply
    2,081.40x = 3,122.10 × 620.58
  4. Step 4: Simplify right side
    2,081.40x = 1,937,512.82
  5. Step 5: Solve for x
    x = 1,937,512.82/2,081.40
  6. Step 6: Final answer
    x = 930.87

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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.