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Finding the Fourth Proportional to 908.03, 1,362.20 and 330.90

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Solution

The fourth proportional to 908.03, 1,362.20 and 330.90 is: 496.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.03 : 1,362.20 = 330.90 : x
  2. Step 2: Convert to fraction form
    908.03/1,362.20 = 330.90/x
  3. Step 3: Cross multiply
    908.03x = 1,362.20 × 330.90
  4. Step 4: Simplify right side
    908.03x = 450,750.33
  5. Step 5: Solve for x
    x = 450,750.33/908.03
  6. Step 6: Final answer
    x = 496.41

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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.