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Finding the Fourth Proportional to 667.54, 995.34 and 666.63

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Solution

The fourth proportional to 667.54, 995.34 and 666.63 is: 993.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.54 : 995.34 = 666.63 : x
  2. Step 2: Convert to fraction form
    667.54/995.34 = 666.63/x
  3. Step 3: Cross multiply
    667.54x = 995.34 × 666.63
  4. Step 4: Simplify right side
    667.54x = 663,522.25
  5. Step 5: Solve for x
    x = 663,522.25/667.54
  6. Step 6: Final answer
    x = 993.98

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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.