Home / 3,431.05-5,146.67-1,239.39

Finding the Fourth Proportional to 3,431.05, 5,146.67 and 1,239.39

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Solution

The fourth proportional to 3,431.05, 5,146.67 and 1,239.39 is: 1,859.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.05 : 5,146.67 = 1,239.39 : x
  2. Step 2: Convert to fraction form
    3,431.05/5,146.67 = 1,239.39/x
  3. Step 3: Cross multiply
    3,431.05x = 5,146.67 × 1,239.39
  4. Step 4: Simplify right side
    3,431.05x = 6,378,734.43
  5. Step 5: Solve for x
    x = 6,378,734.43/3,431.05
  6. Step 6: Final answer
    x = 1,859.12

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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.