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Finding the Fourth Proportional to 969.89, 1,453.35 and 449.79

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Solution

The fourth proportional to 969.89, 1,453.35 and 449.79 is: 674.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.89 : 1,453.35 = 449.79 : x
  2. Step 2: Convert to fraction form
    969.89/1,453.35 = 449.79/x
  3. Step 3: Cross multiply
    969.89x = 1,453.35 × 449.79
  4. Step 4: Simplify right side
    969.89x = 653,702.30
  5. Step 5: Solve for x
    x = 653,702.30/969.89
  6. Step 6: Final answer
    x = 674.00

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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.