Home / 1,428.70-2,140.26-1,273.90

Finding the Fourth Proportional to 1,428.70, 2,140.26 and 1,273.90

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Solution

The fourth proportional to 1,428.70, 2,140.26 and 1,273.90 is: 1,908.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.70 : 2,140.26 = 1,273.90 : x
  2. Step 2: Convert to fraction form
    1,428.70/2,140.26 = 1,273.90/x
  3. Step 3: Cross multiply
    1,428.70x = 2,140.26 × 1,273.90
  4. Step 4: Simplify right side
    1,428.70x = 2,726,477.21
  5. Step 5: Solve for x
    x = 2,726,477.21/1,428.70
  6. Step 6: Final answer
    x = 1,908.36

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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.