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Finding the Fourth Proportional to 663.79, 995.65 and 201.58

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Solution

The fourth proportional to 663.79, 995.65 and 201.58 is: 302.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.79 : 995.65 = 201.58 : x
  2. Step 2: Convert to fraction form
    663.79/995.65 = 201.58/x
  3. Step 3: Cross multiply
    663.79x = 995.65 × 201.58
  4. Step 4: Simplify right side
    663.79x = 200,703.13
  5. Step 5: Solve for x
    x = 200,703.13/663.79
  6. Step 6: Final answer
    x = 302.36

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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.