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Finding the Fourth Proportional to 549.22, 757.89 and 316.42

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Solution

The fourth proportional to 549.22, 757.89 and 316.42 is: 436.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.22 : 757.89 = 316.42 : x
  2. Step 2: Convert to fraction form
    549.22/757.89 = 316.42/x
  3. Step 3: Cross multiply
    549.22x = 757.89 × 316.42
  4. Step 4: Simplify right side
    549.22x = 239,811.55
  5. Step 5: Solve for x
    x = 239,811.55/549.22
  6. Step 6: Final answer
    x = 436.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.