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Finding the Fourth Proportional to 383.89, 576.06 and 140.39

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Solution

The fourth proportional to 383.89, 576.06 and 140.39 is: 210.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.89 : 576.06 = 140.39 : x
  2. Step 2: Convert to fraction form
    383.89/576.06 = 140.39/x
  3. Step 3: Cross multiply
    383.89x = 576.06 × 140.39
  4. Step 4: Simplify right side
    383.89x = 80,873.06
  5. Step 5: Solve for x
    x = 80,873.06/383.89
  6. Step 6: Final answer
    x = 210.67

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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.