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Finding the Fourth Proportional to 549.42, 757.80 and 328.20

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Solution

The fourth proportional to 549.42, 757.80 and 328.20 is: 452.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.42 : 757.80 = 328.20 : x
  2. Step 2: Convert to fraction form
    549.42/757.80 = 328.20/x
  3. Step 3: Cross multiply
    549.42x = 757.80 × 328.20
  4. Step 4: Simplify right side
    549.42x = 248,709.96
  5. Step 5: Solve for x
    x = 248,709.96/549.42
  6. Step 6: Final answer
    x = 452.68

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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.