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Finding the Fourth Proportional to 333.60, 500.23 and 138.57

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Solution

The fourth proportional to 333.60, 500.23 and 138.57 is: 207.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.60 : 500.23 = 138.57 : x
  2. Step 2: Convert to fraction form
    333.60/500.23 = 138.57/x
  3. Step 3: Cross multiply
    333.60x = 500.23 × 138.57
  4. Step 4: Simplify right side
    333.60x = 69,316.87
  5. Step 5: Solve for x
    x = 69,316.87/333.60
  6. Step 6: Final answer
    x = 207.78

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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.