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Finding the Fourth Proportional to 668.52, 995.01 and 663.24

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Solution

The fourth proportional to 668.52, 995.01 and 663.24 is: 987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.52 : 995.01 = 663.24 : x
  2. Step 2: Convert to fraction form
    668.52/995.01 = 663.24/x
  3. Step 3: Cross multiply
    668.52x = 995.01 × 663.24
  4. Step 4: Simplify right side
    668.52x = 659,930.43
  5. Step 5: Solve for x
    x = 659,930.43/668.52
  6. Step 6: Final answer
    x = 987.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.