Home / 3,427.20-5,140.80-3,405.60

Finding the Fourth Proportional to 3,427.20, 5,140.80 and 3,405.60

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Solution

The fourth proportional to 3,427.20, 5,140.80 and 3,405.60 is: 5,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,427.20 : 5,140.80 = 3,405.60 : x
  2. Step 2: Convert to fraction form
    3,427.20/5,140.80 = 3,405.60/x
  3. Step 3: Cross multiply
    3,427.20x = 5,140.80 × 3,405.60
  4. Step 4: Simplify right side
    3,427.20x = 17,507,508.48
  5. Step 5: Solve for x
    x = 17,507,508.48/3,427.20
  6. Step 6: Final answer
    x = 5,108.40

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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.