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Finding the Fourth Proportional to 2,140.70, 3,203.85 and 2,140.70

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Solution

The fourth proportional to 2,140.70, 3,203.85 and 2,140.70 is: 3,203.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.70 : 3,203.85 = 2,140.70 : x
  2. Step 2: Convert to fraction form
    2,140.70/3,203.85 = 2,140.70/x
  3. Step 3: Cross multiply
    2,140.70x = 3,203.85 × 2,140.70
  4. Step 4: Simplify right side
    2,140.70x = 6,858,481.70
  5. Step 5: Solve for x
    x = 6,858,481.70/2,140.70
  6. Step 6: Final answer
    x = 3,203.85

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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.