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Finding the Fourth Proportional to 549.21, 757.98 and 316.34

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Solution

The fourth proportional to 549.21, 757.98 and 316.34 is: 436.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.21 : 757.98 = 316.34 : x
  2. Step 2: Convert to fraction form
    549.21/757.98 = 316.34/x
  3. Step 3: Cross multiply
    549.21x = 757.98 × 316.34
  4. Step 4: Simplify right side
    549.21x = 239,775.60
  5. Step 5: Solve for x
    x = 239,775.60/549.21
  6. Step 6: Final answer
    x = 436.58

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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.