Home / 1,423.27-2,135.21-449.45

Finding the Fourth Proportional to 1,423.27, 2,135.21 and 449.45

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Solution

The fourth proportional to 1,423.27, 2,135.21 and 449.45 is: 674.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.27 : 2,135.21 = 449.45 : x
  2. Step 2: Convert to fraction form
    1,423.27/2,135.21 = 449.45/x
  3. Step 3: Cross multiply
    1,423.27x = 2,135.21 × 449.45
  4. Step 4: Simplify right side
    1,423.27x = 959,667.75
  5. Step 5: Solve for x
    x = 959,667.75/1,423.27
  6. Step 6: Final answer
    x = 674.27

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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.