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Finding the Fourth Proportional to 418.76, 576.68 and 379.57

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Solution

The fourth proportional to 418.76, 576.68 and 379.57 is: 522.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.76 : 576.68 = 379.57 : x
  2. Step 2: Convert to fraction form
    418.76/576.68 = 379.57/x
  3. Step 3: Cross multiply
    418.76x = 576.68 × 379.57
  4. Step 4: Simplify right side
    418.76x = 218,890.43
  5. Step 5: Solve for x
    x = 218,890.43/418.76
  6. Step 6: Final answer
    x = 522.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.