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Finding the Fourth Proportional to 328.90, 493.20 and 174.79

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Solution

The fourth proportional to 328.90, 493.20 and 174.79 is: 262.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.90 : 493.20 = 174.79 : x
  2. Step 2: Convert to fraction form
    328.90/493.20 = 174.79/x
  3. Step 3: Cross multiply
    328.90x = 493.20 × 174.79
  4. Step 4: Simplify right side
    328.90x = 86,207.29
  5. Step 5: Solve for x
    x = 86,207.29/328.90
  6. Step 6: Final answer
    x = 262.11

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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.