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Finding the Fourth Proportional to 442.68, 664.22 and 435.39

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Solution

The fourth proportional to 442.68, 664.22 and 435.39 is: 653.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.68 : 664.22 = 435.39 : x
  2. Step 2: Convert to fraction form
    442.68/664.22 = 435.39/x
  3. Step 3: Cross multiply
    442.68x = 664.22 × 435.39
  4. Step 4: Simplify right side
    442.68x = 289,194.75
  5. Step 5: Solve for x
    x = 289,194.75/442.68
  6. Step 6: Final answer
    x = 653.28

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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.