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Finding the Fourth Proportional to 333.08, 499.92 and 138.20

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Solution

The fourth proportional to 333.08, 499.92 and 138.20 is: 207.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.08 : 499.92 = 138.20 : x
  2. Step 2: Convert to fraction form
    333.08/499.92 = 138.20/x
  3. Step 3: Cross multiply
    333.08x = 499.92 × 138.20
  4. Step 4: Simplify right side
    333.08x = 69,088.94
  5. Step 5: Solve for x
    x = 69,088.94/333.08
  6. Step 6: Final answer
    x = 207.42

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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.