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Finding the Fourth Proportional to 383.99, 575.90 and 140.43

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Solution

The fourth proportional to 383.99, 575.90 and 140.43 is: 210.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.99 : 575.90 = 140.43 : x
  2. Step 2: Convert to fraction form
    383.99/575.90 = 140.43/x
  3. Step 3: Cross multiply
    383.99x = 575.90 × 140.43
  4. Step 4: Simplify right side
    383.99x = 80,873.64
  5. Step 5: Solve for x
    x = 80,873.64/383.99
  6. Step 6: Final answer
    x = 210.61

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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.