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Finding the Fourth Proportional to 549.19, 821.89 and 450.55

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Solution

The fourth proportional to 549.19, 821.89 and 450.55 is: 674.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.19 : 821.89 = 450.55 : x
  2. Step 2: Convert to fraction form
    549.19/821.89 = 450.55/x
  3. Step 3: Cross multiply
    549.19x = 821.89 × 450.55
  4. Step 4: Simplify right side
    549.19x = 370,302.54
  5. Step 5: Solve for x
    x = 370,302.54/549.19
  6. Step 6: Final answer
    x = 674.27

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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.