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Finding the Fourth Proportional to 3,979.76, 5,970.28 and 1,383.44

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Solution

The fourth proportional to 3,979.76, 5,970.28 and 1,383.44 is: 2,075.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.76 : 5,970.28 = 1,383.44 : x
  2. Step 2: Convert to fraction form
    3,979.76/5,970.28 = 1,383.44/x
  3. Step 3: Cross multiply
    3,979.76x = 5,970.28 × 1,383.44
  4. Step 4: Simplify right side
    3,979.76x = 8,259,524.16
  5. Step 5: Solve for x
    x = 8,259,524.16/3,979.76
  6. Step 6: Final answer
    x = 2,075.38

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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.