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Finding the Fourth Proportional to 666.61, 995.49 and 659.37

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Solution

The fourth proportional to 666.61, 995.49 and 659.37 is: 984.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.61 : 995.49 = 659.37 : x
  2. Step 2: Convert to fraction form
    666.61/995.49 = 659.37/x
  3. Step 3: Cross multiply
    666.61x = 995.49 × 659.37
  4. Step 4: Simplify right side
    666.61x = 656,394.46
  5. Step 5: Solve for x
    x = 656,394.46/666.61
  6. Step 6: Final answer
    x = 984.68

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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.