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Finding the Fourth Proportional to 1,326.34, 1,989.49 and 449.04

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Solution

The fourth proportional to 1,326.34, 1,989.49 and 449.04 is: 673.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.34 : 1,989.49 = 449.04 : x
  2. Step 2: Convert to fraction form
    1,326.34/1,989.49 = 449.04/x
  3. Step 3: Cross multiply
    1,326.34x = 1,989.49 × 449.04
  4. Step 4: Simplify right side
    1,326.34x = 893,348.40
  5. Step 5: Solve for x
    x = 893,348.40/1,326.34
  6. Step 6: Final answer
    x = 673.54

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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.