Home / 3,111.90-4,670.73-1,381.02

Finding the Fourth Proportional to 3,111.90, 4,670.73 and 1,381.02

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Solution

The fourth proportional to 3,111.90, 4,670.73 and 1,381.02 is: 2,072.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.90 : 4,670.73 = 1,381.02 : x
  2. Step 2: Convert to fraction form
    3,111.90/4,670.73 = 1,381.02/x
  3. Step 3: Cross multiply
    3,111.90x = 4,670.73 × 1,381.02
  4. Step 4: Simplify right side
    3,111.90x = 6,450,371.54
  5. Step 5: Solve for x
    x = 6,450,371.54/3,111.90
  6. Step 6: Final answer
    x = 2,072.81

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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.