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Finding the Fourth Proportional to 2,660.70, 3,983.13 and 1,970.40

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Solution

The fourth proportional to 2,660.70, 3,983.13 and 1,970.40 is: 2,949.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.70 : 3,983.13 = 1,970.40 : x
  2. Step 2: Convert to fraction form
    2,660.70/3,983.13 = 1,970.40/x
  3. Step 3: Cross multiply
    2,660.70x = 3,983.13 × 1,970.40
  4. Step 4: Simplify right side
    2,660.70x = 7,848,359.35
  5. Step 5: Solve for x
    x = 7,848,359.35/2,660.70
  6. Step 6: Final answer
    x = 2,949.73

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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.