Home / 3,430.56-5,138.64-2,912.88

Finding the Fourth Proportional to 3,430.56, 5,138.64 and 2,912.88

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Solution

The fourth proportional to 3,430.56, 5,138.64 and 2,912.88 is: 4,363.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.56 : 5,138.64 = 2,912.88 : x
  2. Step 2: Convert to fraction form
    3,430.56/5,138.64 = 2,912.88/x
  3. Step 3: Cross multiply
    3,430.56x = 5,138.64 × 2,912.88
  4. Step 4: Simplify right side
    3,430.56x = 14,968,241.68
  5. Step 5: Solve for x
    x = 14,968,241.68/3,430.56
  6. Step 6: Final answer
    x = 4,363.21

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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.