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Finding the Fourth Proportional to 442.07, 662.73 and 279.39

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Solution

The fourth proportional to 442.07, 662.73 and 279.39 is: 418.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.07 : 662.73 = 279.39 : x
  2. Step 2: Convert to fraction form
    442.07/662.73 = 279.39/x
  3. Step 3: Cross multiply
    442.07x = 662.73 × 279.39
  4. Step 4: Simplify right side
    442.07x = 185,160.13
  5. Step 5: Solve for x
    x = 185,160.13/442.07
  6. Step 6: Final answer
    x = 418.85

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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.