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Finding the Fourth Proportional to 433.75, 650.85 and 189.99

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Solution

The fourth proportional to 433.75, 650.85 and 189.99 is: 285.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.75 : 650.85 = 189.99 : x
  2. Step 2: Convert to fraction form
    433.75/650.85 = 189.99/x
  3. Step 3: Cross multiply
    433.75x = 650.85 × 189.99
  4. Step 4: Simplify right side
    433.75x = 123,650.79
  5. Step 5: Solve for x
    x = 123,650.79/433.75
  6. Step 6: Final answer
    x = 285.07

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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.