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Finding the Fourth Proportional to 549.55, 758.20 and 328.44

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Solution

The fourth proportional to 549.55, 758.20 and 328.44 is: 453.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.55 : 758.20 = 328.44 : x
  2. Step 2: Convert to fraction form
    549.55/758.20 = 328.44/x
  3. Step 3: Cross multiply
    549.55x = 758.20 × 328.44
  4. Step 4: Simplify right side
    549.55x = 249,023.21
  5. Step 5: Solve for x
    x = 249,023.21/549.55
  6. Step 6: Final answer
    x = 453.14

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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.