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Finding the Fourth Proportional to 333.62, 500.43 and 128.29

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Solution

The fourth proportional to 333.62, 500.43 and 128.29 is: 192.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.62 : 500.43 = 128.29 : x
  2. Step 2: Convert to fraction form
    333.62/500.43 = 128.29/x
  3. Step 3: Cross multiply
    333.62x = 500.43 × 128.29
  4. Step 4: Simplify right side
    333.62x = 64,199.39
  5. Step 5: Solve for x
    x = 64,199.39/333.62
  6. Step 6: Final answer
    x = 192.43

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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.