Home / 1,429.22-2,143.80-455.31

Finding the Fourth Proportional to 1,429.22, 2,143.80 and 455.31

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Solution

The fourth proportional to 1,429.22, 2,143.80 and 455.31 is: 682.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.22 : 2,143.80 = 455.31 : x
  2. Step 2: Convert to fraction form
    1,429.22/2,143.80 = 455.31/x
  3. Step 3: Cross multiply
    1,429.22x = 2,143.80 × 455.31
  4. Step 4: Simplify right side
    1,429.22x = 976,093.58
  5. Step 5: Solve for x
    x = 976,093.58/1,429.22
  6. Step 6: Final answer
    x = 682.96

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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.