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Finding the Fourth Proportional to 1,645.21, 2,468.31 and 490.96

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Solution

The fourth proportional to 1,645.21, 2,468.31 and 490.96 is: 736.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.21 : 2,468.31 = 490.96 : x
  2. Step 2: Convert to fraction form
    1,645.21/2,468.31 = 490.96/x
  3. Step 3: Cross multiply
    1,645.21x = 2,468.31 × 490.96
  4. Step 4: Simplify right side
    1,645.21x = 1,211,841.48
  5. Step 5: Solve for x
    x = 1,211,841.48/1,645.21
  6. Step 6: Final answer
    x = 736.59

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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.