Home / 1,429.25-2,143.96-455.43

Finding the Fourth Proportional to 1,429.25, 2,143.96 and 455.43

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Solution

The fourth proportional to 1,429.25, 2,143.96 and 455.43 is: 683.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.25 : 2,143.96 = 455.43 : x
  2. Step 2: Convert to fraction form
    1,429.25/2,143.96 = 455.43/x
  3. Step 3: Cross multiply
    1,429.25x = 2,143.96 × 455.43
  4. Step 4: Simplify right side
    1,429.25x = 976,422.56
  5. Step 5: Solve for x
    x = 976,422.56/1,429.25
  6. Step 6: Final answer
    x = 683.17

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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.