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Finding the Fourth Proportional to 535.91, 802.89 and 449.80

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Solution

The fourth proportional to 535.91, 802.89 and 449.80 is: 673.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.91 : 802.89 = 449.80 : x
  2. Step 2: Convert to fraction form
    535.91/802.89 = 449.80/x
  3. Step 3: Cross multiply
    535.91x = 802.89 × 449.80
  4. Step 4: Simplify right side
    535.91x = 361,137.91
  5. Step 5: Solve for x
    x = 361,137.91/535.91
  6. Step 6: Final answer
    x = 673.88

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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.