Home / 1,429.14-2,143.73-455.25

Finding the Fourth Proportional to 1,429.14, 2,143.73 and 455.25

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Solution

The fourth proportional to 1,429.14, 2,143.73 and 455.25 is: 682.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.14 : 2,143.73 = 455.25 : x
  2. Step 2: Convert to fraction form
    1,429.14/2,143.73 = 455.25/x
  3. Step 3: Cross multiply
    1,429.14x = 2,143.73 × 455.25
  4. Step 4: Simplify right side
    1,429.14x = 975,942.26
  5. Step 5: Solve for x
    x = 975,942.26/1,429.14
  6. Step 6: Final answer
    x = 682.89

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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.