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Finding the Fourth Proportional to 664.02, 995.43 and 279.06

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Solution

The fourth proportional to 664.02, 995.43 and 279.06 is: 418.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.02 : 995.43 = 279.06 : x
  2. Step 2: Convert to fraction form
    664.02/995.43 = 279.06/x
  3. Step 3: Cross multiply
    664.02x = 995.43 × 279.06
  4. Step 4: Simplify right side
    664.02x = 277,784.70
  5. Step 5: Solve for x
    x = 277,784.70/664.02
  6. Step 6: Final answer
    x = 418.34

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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.