Home / 280,536.78-420,133.26-204,431.31

Finding the Fourth Proportional to 280,536.78, 420,133.26 and 204,431.31

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Solution

The fourth proportional to 280,536.78, 420,133.26 and 204,431.31 is: 306,157.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,536.78 : 420,133.26 = 204,431.31 : x
  2. Step 2: Convert to fraction form
    280,536.78/420,133.26 = 204,431.31/x
  3. Step 3: Cross multiply
    280,536.78x = 420,133.26 × 204,431.31
  4. Step 4: Simplify right side
    280,536.78x = 85,888,392,716.37
  5. Step 5: Solve for x
    x = 85,888,392,716.37/280,536.78
  6. Step 6: Final answer
    x = 306,157.33

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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.