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Finding the Fourth Proportional to 666.39, 995.10 and 662.34

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Solution

The fourth proportional to 666.39, 995.10 and 662.34 is: 989.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.39 : 995.10 = 662.34 : x
  2. Step 2: Convert to fraction form
    666.39/995.10 = 662.34/x
  3. Step 3: Cross multiply
    666.39x = 995.10 × 662.34
  4. Step 4: Simplify right side
    666.39x = 659,094.53
  5. Step 5: Solve for x
    x = 659,094.53/666.39
  6. Step 6: Final answer
    x = 989.05

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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.