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Finding the Fourth Proportional to 496.11, 744.63 and 431.31

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Solution

The fourth proportional to 496.11, 744.63 and 431.31 is: 647.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.11 : 744.63 = 431.31 : x
  2. Step 2: Convert to fraction form
    496.11/744.63 = 431.31/x
  3. Step 3: Cross multiply
    496.11x = 744.63 × 431.31
  4. Step 4: Simplify right side
    496.11x = 321,166.37
  5. Step 5: Solve for x
    x = 321,166.37/496.11
  6. Step 6: Final answer
    x = 647.37

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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.