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Finding the Fourth Proportional to 333.54, 499.94 and 138.45

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Solution

The fourth proportional to 333.54, 499.94 and 138.45 is: 207.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.54 : 499.94 = 138.45 : x
  2. Step 2: Convert to fraction form
    333.54/499.94 = 138.45/x
  3. Step 3: Cross multiply
    333.54x = 499.94 × 138.45
  4. Step 4: Simplify right side
    333.54x = 69,216.69
  5. Step 5: Solve for x
    x = 69,216.69/333.54
  6. Step 6: Final answer
    x = 207.52

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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.