Home / 3,420.84-5,131.25-1,081.02

Finding the Fourth Proportional to 3,420.84, 5,131.25 and 1,081.02

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Solution

The fourth proportional to 3,420.84, 5,131.25 and 1,081.02 is: 1,621.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.84 : 5,131.25 = 1,081.02 : x
  2. Step 2: Convert to fraction form
    3,420.84/5,131.25 = 1,081.02/x
  3. Step 3: Cross multiply
    3,420.84x = 5,131.25 × 1,081.02
  4. Step 4: Simplify right side
    3,420.84x = 5,546,983.88
  5. Step 5: Solve for x
    x = 5,546,983.88/3,420.84
  6. Step 6: Final answer
    x = 1,621.53

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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.