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Finding the Fourth Proportional to 538.07, 742.26 and 351.67

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Solution

The fourth proportional to 538.07, 742.26 and 351.67 is: 485.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.07 : 742.26 = 351.67 : x
  2. Step 2: Convert to fraction form
    538.07/742.26 = 351.67/x
  3. Step 3: Cross multiply
    538.07x = 742.26 × 351.67
  4. Step 4: Simplify right side
    538.07x = 261,025.54
  5. Step 5: Solve for x
    x = 261,025.54/538.07
  6. Step 6: Final answer
    x = 485.12

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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.