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Finding the Fourth Proportional to 328.73, 493.10 and 112.30

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Solution

The fourth proportional to 328.73, 493.10 and 112.30 is: 168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.73 : 493.10 = 112.30 : x
  2. Step 2: Convert to fraction form
    328.73/493.10 = 112.30/x
  3. Step 3: Cross multiply
    328.73x = 493.10 × 112.30
  4. Step 4: Simplify right side
    328.73x = 55,375.13
  5. Step 5: Solve for x
    x = 55,375.13/328.73
  6. Step 6: Final answer
    x = 168.45

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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.