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Finding the Fourth Proportional to 328.74, 493.11 and 146.27

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Solution

The fourth proportional to 328.74, 493.11 and 146.27 is: 219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.74 : 493.11 = 146.27 : x
  2. Step 2: Convert to fraction form
    328.74/493.11 = 146.27/x
  3. Step 3: Cross multiply
    328.74x = 493.11 × 146.27
  4. Step 4: Simplify right side
    328.74x = 72,124.73
  5. Step 5: Solve for x
    x = 72,124.73/328.74
  6. Step 6: Final answer
    x = 219.40

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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.