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Finding the Fourth Proportional to 328.88, 493.32 and 198.74

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Solution

The fourth proportional to 328.88, 493.32 and 198.74 is: 298.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.88 : 493.32 = 198.74 : x
  2. Step 2: Convert to fraction form
    328.88/493.32 = 198.74/x
  3. Step 3: Cross multiply
    328.88x = 493.32 × 198.74
  4. Step 4: Simplify right side
    328.88x = 98,042.42
  5. Step 5: Solve for x
    x = 98,042.42/328.88
  6. Step 6: Final answer
    x = 298.11

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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.