Home / 2,813.79-4,223.26-1,428.09

Finding the Fourth Proportional to 2,813.79, 4,223.26 and 1,428.09

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Solution

The fourth proportional to 2,813.79, 4,223.26 and 1,428.09 is: 2,143.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.79 : 4,223.26 = 1,428.09 : x
  2. Step 2: Convert to fraction form
    2,813.79/4,223.26 = 1,428.09/x
  3. Step 3: Cross multiply
    2,813.79x = 4,223.26 × 1,428.09
  4. Step 4: Simplify right side
    2,813.79x = 6,031,195.37
  5. Step 5: Solve for x
    x = 6,031,195.37/2,813.79
  6. Step 6: Final answer
    x = 2,143.44

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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.