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Finding the Fourth Proportional to 328.09, 452.72 and 188.21

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Solution

The fourth proportional to 328.09, 452.72 and 188.21 is: 259.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.09 : 452.72 = 188.21 : x
  2. Step 2: Convert to fraction form
    328.09/452.72 = 188.21/x
  3. Step 3: Cross multiply
    328.09x = 452.72 × 188.21
  4. Step 4: Simplify right side
    328.09x = 85,206.43
  5. Step 5: Solve for x
    x = 85,206.43/328.09
  6. Step 6: Final answer
    x = 259.71

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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.