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Finding the Fourth Proportional to 328.18, 452.90 and 245.56

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Solution

The fourth proportional to 328.18, 452.90 and 245.56 is: 338.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.18 : 452.90 = 245.56 : x
  2. Step 2: Convert to fraction form
    328.18/452.90 = 245.56/x
  3. Step 3: Cross multiply
    328.18x = 452.90 × 245.56
  4. Step 4: Simplify right side
    328.18x = 111,214.12
  5. Step 5: Solve for x
    x = 111,214.12/328.18
  6. Step 6: Final answer
    x = 338.88

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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.