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Finding the Fourth Proportional to 328.05, 492.12 and 145.33

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Solution

The fourth proportional to 328.05, 492.12 and 145.33 is: 218.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.05 : 492.12 = 145.33 : x
  2. Step 2: Convert to fraction form
    328.05/492.12 = 145.33/x
  3. Step 3: Cross multiply
    328.05x = 492.12 × 145.33
  4. Step 4: Simplify right side
    328.05x = 71,518.57
  5. Step 5: Solve for x
    x = 71,518.57/328.05
  6. Step 6: Final answer
    x = 218.01

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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.