Home / 1,428.88-2,145.30-945.04

Finding the Fourth Proportional to 1,428.88, 2,145.30 and 945.04

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Solution

The fourth proportional to 1,428.88, 2,145.30 and 945.04 is: 1,418.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.88 : 2,145.30 = 945.04 : x
  2. Step 2: Convert to fraction form
    1,428.88/2,145.30 = 945.04/x
  3. Step 3: Cross multiply
    1,428.88x = 2,145.30 × 945.04
  4. Step 4: Simplify right side
    1,428.88x = 2,027,394.31
  5. Step 5: Solve for x
    x = 2,027,394.31/1,428.88
  6. Step 6: Final answer
    x = 1,418.87

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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.