Home / 3,430.70-5,138.85-1,889.90

Finding the Fourth Proportional to 3,430.70, 5,138.85 and 1,889.90

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Solution

The fourth proportional to 3,430.70, 5,138.85 and 1,889.90 is: 2,830.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.70 : 5,138.85 = 1,889.90 : x
  2. Step 2: Convert to fraction form
    3,430.70/5,138.85 = 1,889.90/x
  3. Step 3: Cross multiply
    3,430.70x = 5,138.85 × 1,889.90
  4. Step 4: Simplify right side
    3,430.70x = 9,711,912.62
  5. Step 5: Solve for x
    x = 9,711,912.62/3,430.70
  6. Step 6: Final answer
    x = 2,830.88

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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.