Home / 1,423.21-2,135.05-449.09

Finding the Fourth Proportional to 1,423.21, 2,135.05 and 449.09

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Solution

The fourth proportional to 1,423.21, 2,135.05 and 449.09 is: 673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.21 : 2,135.05 = 449.09 : x
  2. Step 2: Convert to fraction form
    1,423.21/2,135.05 = 449.09/x
  3. Step 3: Cross multiply
    1,423.21x = 2,135.05 × 449.09
  4. Step 4: Simplify right side
    1,423.21x = 958,819.49
  5. Step 5: Solve for x
    x = 958,819.49/1,423.21
  6. Step 6: Final answer
    x = 673.70

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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.