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Finding the Fourth Proportional to 437.20, 655.30 and 328.64

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Solution

The fourth proportional to 437.20, 655.30 and 328.64 is: 492.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.20 : 655.30 = 328.64 : x
  2. Step 2: Convert to fraction form
    437.20/655.30 = 328.64/x
  3. Step 3: Cross multiply
    437.20x = 655.30 × 328.64
  4. Step 4: Simplify right side
    437.20x = 215,357.79
  5. Step 5: Solve for x
    x = 215,357.79/437.20
  6. Step 6: Final answer
    x = 492.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.