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Finding the Fourth Proportional to 549.57, 758.28 and 328.56

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Solution

The fourth proportional to 549.57, 758.28 and 328.56 is: 453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.57 : 758.28 = 328.56 : x
  2. Step 2: Convert to fraction form
    549.57/758.28 = 328.56/x
  3. Step 3: Cross multiply
    549.57x = 758.28 × 328.56
  4. Step 4: Simplify right side
    549.57x = 249,140.48
  5. Step 5: Solve for x
    x = 249,140.48/549.57
  6. Step 6: Final answer
    x = 453.34

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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.