Home / 2,125.85-3,190.79-1,305.72

Finding the Fourth Proportional to 2,125.85, 3,190.79 and 1,305.72

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Solution

The fourth proportional to 2,125.85, 3,190.79 and 1,305.72 is: 1,959.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.85 : 3,190.79 = 1,305.72 : x
  2. Step 2: Convert to fraction form
    2,125.85/3,190.79 = 1,305.72/x
  3. Step 3: Cross multiply
    2,125.85x = 3,190.79 × 1,305.72
  4. Step 4: Simplify right side
    2,125.85x = 4,166,293.55
  5. Step 5: Solve for x
    x = 4,166,293.55/2,125.85
  6. Step 6: Final answer
    x = 1,959.83

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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.