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Finding the Fourth Proportional to 442.26, 663.39 and 407.03

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Solution

The fourth proportional to 442.26, 663.39 and 407.03 is: 610.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.26 : 663.39 = 407.03 : x
  2. Step 2: Convert to fraction form
    442.26/663.39 = 407.03/x
  3. Step 3: Cross multiply
    442.26x = 663.39 × 407.03
  4. Step 4: Simplify right side
    442.26x = 270,016.31
  5. Step 5: Solve for x
    x = 270,016.31/442.26
  6. Step 6: Final answer
    x = 610.54

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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.