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Finding the Fourth Proportional to 2,630.91, 3,942.91 and 1,395.70

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Solution

The fourth proportional to 2,630.91, 3,942.91 and 1,395.70 is: 2,091.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,630.91 : 3,942.91 = 1,395.70 : x
  2. Step 2: Convert to fraction form
    2,630.91/3,942.91 = 1,395.70/x
  3. Step 3: Cross multiply
    2,630.91x = 3,942.91 × 1,395.70
  4. Step 4: Simplify right side
    2,630.91x = 5,503,119.49
  5. Step 5: Solve for x
    x = 5,503,119.49/2,630.91
  6. Step 6: Final answer
    x = 2,091.72

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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.