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Finding the Fourth Proportional to 383.97, 576.09 and 140.70

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Solution

The fourth proportional to 383.97, 576.09 and 140.70 is: 211.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.97 : 576.09 = 140.70 : x
  2. Step 2: Convert to fraction form
    383.97/576.09 = 140.70/x
  3. Step 3: Cross multiply
    383.97x = 576.09 × 140.70
  4. Step 4: Simplify right side
    383.97x = 81,055.86
  5. Step 5: Solve for x
    x = 81,055.86/383.97
  6. Step 6: Final answer
    x = 211.10

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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.