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Finding the Fourth Proportional to 2,626.70, 3,936.70 and 1,394.70

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Solution

The fourth proportional to 2,626.70, 3,936.70 and 1,394.70 is: 2,090.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,626.70 : 3,936.70 = 1,394.70 : x
  2. Step 2: Convert to fraction form
    2,626.70/3,936.70 = 1,394.70/x
  3. Step 3: Cross multiply
    2,626.70x = 3,936.70 × 1,394.70
  4. Step 4: Simplify right side
    2,626.70x = 5,490,515.49
  5. Step 5: Solve for x
    x = 5,490,515.49/2,626.70
  6. Step 6: Final answer
    x = 2,090.27

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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.