Home / 3,072.87-4,609.29-1,428.51

Finding the Fourth Proportional to 3,072.87, 4,609.29 and 1,428.51

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Solution

The fourth proportional to 3,072.87, 4,609.29 and 1,428.51 is: 2,142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.87 : 4,609.29 = 1,428.51 : x
  2. Step 2: Convert to fraction form
    3,072.87/4,609.29 = 1,428.51/x
  3. Step 3: Cross multiply
    3,072.87x = 4,609.29 × 1,428.51
  4. Step 4: Simplify right side
    3,072.87x = 6,584,416.86
  5. Step 5: Solve for x
    x = 6,584,416.86/3,072.87
  6. Step 6: Final answer
    x = 2,142.76

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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.