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Finding the Fourth Proportional to 3,930.96, 5,896.44 and 1,980.48

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Solution

The fourth proportional to 3,930.96, 5,896.44 and 1,980.48 is: 2,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.96 : 5,896.44 = 1,980.48 : x
  2. Step 2: Convert to fraction form
    3,930.96/5,896.44 = 1,980.48/x
  3. Step 3: Cross multiply
    3,930.96x = 5,896.44 × 1,980.48
  4. Step 4: Simplify right side
    3,930.96x = 11,677,781.49
  5. Step 5: Solve for x
    x = 11,677,781.49/3,930.96
  6. Step 6: Final answer
    x = 2,970.72

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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.