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Finding the Fourth Proportional to 549.21, 757.98 and 328.29

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Solution

The fourth proportional to 549.21, 757.98 and 328.29 is: 453.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.21 : 757.98 = 328.29 : x
  2. Step 2: Convert to fraction form
    549.21/757.98 = 328.29/x
  3. Step 3: Cross multiply
    549.21x = 757.98 × 328.29
  4. Step 4: Simplify right side
    549.21x = 248,837.25
  5. Step 5: Solve for x
    x = 248,837.25/549.21
  6. Step 6: Final answer
    x = 453.08

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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.