Home / 3,939.96-5,905.80-1,988.08

Finding the Fourth Proportional to 3,939.96, 5,905.80 and 1,988.08

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Solution

The fourth proportional to 3,939.96, 5,905.80 and 1,988.08 is: 2,980.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.96 : 5,905.80 = 1,988.08 : x
  2. Step 2: Convert to fraction form
    3,939.96/5,905.80 = 1,988.08/x
  3. Step 3: Cross multiply
    3,939.96x = 5,905.80 × 1,988.08
  4. Step 4: Simplify right side
    3,939.96x = 11,741,202.86
  5. Step 5: Solve for x
    x = 11,741,202.86/3,939.96
  6. Step 6: Final answer
    x = 2,980.03

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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.