Home / 1,429.28-2,143.92-403.28

Finding the Fourth Proportional to 1,429.28, 2,143.92 and 403.28

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Solution

The fourth proportional to 1,429.28, 2,143.92 and 403.28 is: 604.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.28 : 2,143.92 = 403.28 : x
  2. Step 2: Convert to fraction form
    1,429.28/2,143.92 = 403.28/x
  3. Step 3: Cross multiply
    1,429.28x = 2,143.92 × 403.28
  4. Step 4: Simplify right side
    1,429.28x = 864,600.06
  5. Step 5: Solve for x
    x = 864,600.06/1,429.28
  6. Step 6: Final answer
    x = 604.92

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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.