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Finding the Fourth Proportional to 491.18, 736.42 and 445.05

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Solution

The fourth proportional to 491.18, 736.42 and 445.05 is: 667.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.18 : 736.42 = 445.05 : x
  2. Step 2: Convert to fraction form
    491.18/736.42 = 445.05/x
  3. Step 3: Cross multiply
    491.18x = 736.42 × 445.05
  4. Step 4: Simplify right side
    491.18x = 327,743.72
  5. Step 5: Solve for x
    x = 327,743.72/491.18
  6. Step 6: Final answer
    x = 667.26

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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.