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Finding the Fourth Proportional to 664.63, 995.57 and 533.91

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Solution

The fourth proportional to 664.63, 995.57 and 533.91 is: 799.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.63 : 995.57 = 533.91 : x
  2. Step 2: Convert to fraction form
    664.63/995.57 = 533.91/x
  3. Step 3: Cross multiply
    664.63x = 995.57 × 533.91
  4. Step 4: Simplify right side
    664.63x = 531,544.78
  5. Step 5: Solve for x
    x = 531,544.78/664.63
  6. Step 6: Final answer
    x = 799.76

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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.