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Finding the Fourth Proportional to 328.20, 452.86 and 188.31

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Solution

The fourth proportional to 328.20, 452.86 and 188.31 is: 259.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.20 : 452.86 = 188.31 : x
  2. Step 2: Convert to fraction form
    328.20/452.86 = 188.31/x
  3. Step 3: Cross multiply
    328.20x = 452.86 × 188.31
  4. Step 4: Simplify right side
    328.20x = 85,276.75
  5. Step 5: Solve for x
    x = 85,276.75/328.20
  6. Step 6: Final answer
    x = 259.83

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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.