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Finding the Fourth Proportional to 542.82, 748.49 and 418.21

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Solution

The fourth proportional to 542.82, 748.49 and 418.21 is: 576.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.82 : 748.49 = 418.21 : x
  2. Step 2: Convert to fraction form
    542.82/748.49 = 418.21/x
  3. Step 3: Cross multiply
    542.82x = 748.49 × 418.21
  4. Step 4: Simplify right side
    542.82x = 313,028.60
  5. Step 5: Solve for x
    x = 313,028.60/542.82
  6. Step 6: Final answer
    x = 576.67

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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.