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Finding the Fourth Proportional to 475.53, 655.88 and 328.11

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Solution

The fourth proportional to 475.53, 655.88 and 328.11 is: 452.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.53 : 655.88 = 328.11 : x
  2. Step 2: Convert to fraction form
    475.53/655.88 = 328.11/x
  3. Step 3: Cross multiply
    475.53x = 655.88 × 328.11
  4. Step 4: Simplify right side
    475.53x = 215,199.15
  5. Step 5: Solve for x
    x = 215,199.15/475.53
  6. Step 6: Final answer
    x = 452.55

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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.