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Finding the Fourth Proportional to 496.88, 746.16 and 431.96

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Solution

The fourth proportional to 496.88, 746.16 and 431.96 is: 648.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.88 : 746.16 = 431.96 : x
  2. Step 2: Convert to fraction form
    496.88/746.16 = 431.96/x
  3. Step 3: Cross multiply
    496.88x = 746.16 × 431.96
  4. Step 4: Simplify right side
    496.88x = 322,311.27
  5. Step 5: Solve for x
    x = 322,311.27/496.88
  6. Step 6: Final answer
    x = 648.67

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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.