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Finding the Fourth Proportional to 1,645.31, 2,467.97 and 491.06

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Solution

The fourth proportional to 1,645.31, 2,467.97 and 491.06 is: 736.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.31 : 2,467.97 = 491.06 : x
  2. Step 2: Convert to fraction form
    1,645.31/2,467.97 = 491.06/x
  3. Step 3: Cross multiply
    1,645.31x = 2,467.97 × 491.06
  4. Step 4: Simplify right side
    1,645.31x = 1,211,926.90
  5. Step 5: Solve for x
    x = 1,211,926.90/1,645.31
  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.