Home / 3,980.45-5,971.23-1,206.81

Finding the Fourth Proportional to 3,980.45, 5,971.23 and 1,206.81

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Solution

The fourth proportional to 3,980.45, 5,971.23 and 1,206.81 is: 1,810.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.45 : 5,971.23 = 1,206.81 : x
  2. Step 2: Convert to fraction form
    3,980.45/5,971.23 = 1,206.81/x
  3. Step 3: Cross multiply
    3,980.45x = 5,971.23 × 1,206.81
  4. Step 4: Simplify right side
    3,980.45x = 7,206,140.08
  5. Step 5: Solve for x
    x = 7,206,140.08/3,980.45
  6. Step 6: Final answer
    x = 1,810.38

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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.