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Finding the Fourth Proportional to 549.72, 822.54 and 329.55

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Solution

The fourth proportional to 549.72, 822.54 and 329.55 is: 493.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.72 : 822.54 = 329.55 : x
  2. Step 2: Convert to fraction form
    549.72/822.54 = 329.55/x
  3. Step 3: Cross multiply
    549.72x = 822.54 × 329.55
  4. Step 4: Simplify right side
    549.72x = 271,068.06
  5. Step 5: Solve for x
    x = 271,068.06/549.72
  6. Step 6: Final answer
    x = 493.10

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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.