Home / 3,119.72-4,679.56-1,270.40

Finding the Fourth Proportional to 3,119.72, 4,679.56 and 1,270.40

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Solution

The fourth proportional to 3,119.72, 4,679.56 and 1,270.40 is: 1,905.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.72 : 4,679.56 = 1,270.40 : x
  2. Step 2: Convert to fraction form
    3,119.72/4,679.56 = 1,270.40/x
  3. Step 3: Cross multiply
    3,119.72x = 4,679.56 × 1,270.40
  4. Step 4: Simplify right side
    3,119.72x = 5,944,891.21
  5. Step 5: Solve for x
    x = 5,944,891.21/3,119.72
  6. Step 6: Final answer
    x = 1,905.59

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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.