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Finding the Fourth Proportional to 549.70, 758.15 and 328.60

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Solution

The fourth proportional to 549.70, 758.15 and 328.60 is: 453.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.70 : 758.15 = 328.60 : x
  2. Step 2: Convert to fraction form
    549.70/758.15 = 328.60/x
  3. Step 3: Cross multiply
    549.70x = 758.15 × 328.60
  4. Step 4: Simplify right side
    549.70x = 249,128.09
  5. Step 5: Solve for x
    x = 249,128.09/549.70
  6. Step 6: Final answer
    x = 453.21

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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.