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Finding the Fourth Proportional to 442.91, 664.54 and 407.03

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Solution

The fourth proportional to 442.91, 664.54 and 407.03 is: 610.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.91 : 664.54 = 407.03 : x
  2. Step 2: Convert to fraction form
    442.91/664.54 = 407.03/x
  3. Step 3: Cross multiply
    442.91x = 664.54 × 407.03
  4. Step 4: Simplify right side
    442.91x = 270,487.72
  5. Step 5: Solve for x
    x = 270,487.72/442.91
  6. Step 6: Final answer
    x = 610.71

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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.