Home / 3,431.20-5,145.55-1,239.34

Finding the Fourth Proportional to 3,431.20, 5,145.55 and 1,239.34

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Solution

The fourth proportional to 3,431.20, 5,145.55 and 1,239.34 is: 1,858.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.20 : 5,145.55 = 1,239.34 : x
  2. Step 2: Convert to fraction form
    3,431.20/5,145.55 = 1,239.34/x
  3. Step 3: Cross multiply
    3,431.20x = 5,145.55 × 1,239.34
  4. Step 4: Simplify right side
    3,431.20x = 6,377,085.94
  5. Step 5: Solve for x
    x = 6,377,085.94/3,431.20
  6. Step 6: Final answer
    x = 1,858.56

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1.5x scale

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.