Home / 1,429.38-2,144.27-455.15

Finding the Fourth Proportional to 1,429.38, 2,144.27 and 455.15

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Solution

The fourth proportional to 1,429.38, 2,144.27 and 455.15 is: 682.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.38 : 2,144.27 = 455.15 : x
  2. Step 2: Convert to fraction form
    1,429.38/2,144.27 = 455.15/x
  3. Step 3: Cross multiply
    1,429.38x = 2,144.27 × 455.15
  4. Step 4: Simplify right side
    1,429.38x = 975,970.99
  5. Step 5: Solve for x
    x = 975,970.99/1,429.38
  6. Step 6: Final answer
    x = 682.79

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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.