Home / 3,405.09-5,103.24-1,428.49

Finding the Fourth Proportional to 3,405.09, 5,103.24 and 1,428.49

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Solution

The fourth proportional to 3,405.09, 5,103.24 and 1,428.49 is: 2,140.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.09 : 5,103.24 = 1,428.49 : x
  2. Step 2: Convert to fraction form
    3,405.09/5,103.24 = 1,428.49/x
  3. Step 3: Cross multiply
    3,405.09x = 5,103.24 × 1,428.49
  4. Step 4: Simplify right side
    3,405.09x = 7,289,927.31
  5. Step 5: Solve for x
    x = 7,289,927.31/3,405.09
  6. Step 6: Final answer
    x = 2,140.89

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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.