Home / 1,423.28-2,135.12-449.25

Finding the Fourth Proportional to 1,423.28, 2,135.12 and 449.25

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Solution

The fourth proportional to 1,423.28, 2,135.12 and 449.25 is: 673.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.28 : 2,135.12 = 449.25 : x
  2. Step 2: Convert to fraction form
    1,423.28/2,135.12 = 449.25/x
  3. Step 3: Cross multiply
    1,423.28x = 2,135.12 × 449.25
  4. Step 4: Simplify right side
    1,423.28x = 959,200.41
  5. Step 5: Solve for x
    x = 959,200.41/1,423.28
  6. Step 6: Final answer
    x = 673.94

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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.