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Finding the Fourth Proportional to 549.20, 757.88 and 328.16

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Solution

The fourth proportional to 549.20, 757.88 and 328.16 is: 452.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.20 : 757.88 = 328.16 : x
  2. Step 2: Convert to fraction form
    549.20/757.88 = 328.16/x
  3. Step 3: Cross multiply
    549.20x = 757.88 × 328.16
  4. Step 4: Simplify right side
    549.20x = 248,705.90
  5. Step 5: Solve for x
    x = 248,705.90/549.20
  6. Step 6: Final answer
    x = 452.85

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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.