Home / 3,291.69-4,939.35-1,972.20

Finding the Fourth Proportional to 3,291.69, 4,939.35 and 1,972.20

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Solution

The fourth proportional to 3,291.69, 4,939.35 and 1,972.20 is: 2,959.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.69 : 4,939.35 = 1,972.20 : x
  2. Step 2: Convert to fraction form
    3,291.69/4,939.35 = 1,972.20/x
  3. Step 3: Cross multiply
    3,291.69x = 4,939.35 × 1,972.20
  4. Step 4: Simplify right side
    3,291.69x = 9,741,361.37
  5. Step 5: Solve for x
    x = 9,741,361.37/3,291.69
  6. Step 6: Final answer
    x = 2,959.38

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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.