Home / 2,813.85-4,223.36-1,428.15

Finding the Fourth Proportional to 2,813.85, 4,223.36 and 1,428.15

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Solution

The fourth proportional to 2,813.85, 4,223.36 and 1,428.15 is: 2,143.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.85 : 4,223.36 = 1,428.15 : x
  2. Step 2: Convert to fraction form
    2,813.85/4,223.36 = 1,428.15/x
  3. Step 3: Cross multiply
    2,813.85x = 4,223.36 × 1,428.15
  4. Step 4: Simplify right side
    2,813.85x = 6,031,591.58
  5. Step 5: Solve for x
    x = 6,031,591.58/2,813.85
  6. Step 6: Final answer
    x = 2,143.54

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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.