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Finding the Fourth Proportional to 333.79, 500.84 and 128.43

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Solution

The fourth proportional to 333.79, 500.84 and 128.43 is: 192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.79 : 500.84 = 128.43 : x
  2. Step 2: Convert to fraction form
    333.79/500.84 = 128.43/x
  3. Step 3: Cross multiply
    333.79x = 500.84 × 128.43
  4. Step 4: Simplify right side
    333.79x = 64,322.72
  5. Step 5: Solve for x
    x = 64,322.72/333.79
  6. Step 6: Final answer
    x = 192.71

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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.