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Finding the Fourth Proportional to 549.54, 758.40 and 328.50

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Solution

The fourth proportional to 549.54, 758.40 and 328.50 is: 453.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.54 : 758.40 = 328.50 : x
  2. Step 2: Convert to fraction form
    549.54/758.40 = 328.50/x
  3. Step 3: Cross multiply
    549.54x = 758.40 × 328.50
  4. Step 4: Simplify right side
    549.54x = 249,134.40
  5. Step 5: Solve for x
    x = 249,134.40/549.54
  6. Step 6: Final answer
    x = 453.35

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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.