Home / 3,980.85-5,970.05-1,383.18

Finding the Fourth Proportional to 3,980.85, 5,970.05 and 1,383.18

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Solution

The fourth proportional to 3,980.85, 5,970.05 and 1,383.18 is: 2,074.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.85 : 5,970.05 = 1,383.18 : x
  2. Step 2: Convert to fraction form
    3,980.85/5,970.05 = 1,383.18/x
  3. Step 3: Cross multiply
    3,980.85x = 5,970.05 × 1,383.18
  4. Step 4: Simplify right side
    3,980.85x = 8,257,637.42
  5. Step 5: Solve for x
    x = 8,257,637.42/3,980.85
  6. Step 6: Final answer
    x = 2,074.34

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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.