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Finding the Fourth Proportional to 333.53, 499.90 and 138.41

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Solution

The fourth proportional to 333.53, 499.90 and 138.41 is: 207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.53 : 499.90 = 138.41 : x
  2. Step 2: Convert to fraction form
    333.53/499.90 = 138.41/x
  3. Step 3: Cross multiply
    333.53x = 499.90 × 138.41
  4. Step 4: Simplify right side
    333.53x = 69,191.16
  5. Step 5: Solve for x
    x = 69,191.16/333.53
  6. Step 6: Final answer
    x = 207.45

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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.